docs(readme): fix review findings

Reverted the <picture> element. #gh-light-mode-only keys off GitHub's
account theme; prefers-color-scheme keys off the OS. They diverge for
anyone who pins a GitHub theme rather than syncing with the system, and
the combination 'OS dark, GitHub light' renders the white logo on white.
The fragment form is correct in all four combinations. Kept the width
attribute, which was the actual fix -- the logo stretched to 734px
because the SVG has no intrinsic width, not because of the fragment.

Also from review:
- /docs/roadmap/ on the website is a 404; linked ROADMAP.md instead.
- Added a project-documents table. The README linked one of the eight
  policy files in the repository root; governance, code of conduct,
  security policy and adopters are what a newcomer and a CNCF reviewer
  both look for first.
- Added both Slack channels. The community section listed Telegram only,
  while the CNCF-hosted #cozystack channel went unmentioned.
- Added the CLOMonitor badge, the standard CNCF project-health signal.
  It currently reports A.
- semver.org was the one remaining plain-http link, which sat oddly next
  to dropping a badge for the same reason.
- The commit-activity badge linked to the contributors graph.
- 'free platform' reads as price now that the Open Source badge is gone.
- 'CNCF Sandbox Level Project' is legacy phrasing.
- Fixed an ungrammatical sentence in Contributions.

Co-Authored-By: Claude <noreply@anthropic.com>
Signed-off-by: tym83 <6355522@gmail.com>

README.md

@@ -1,20 +1,19 @@
-<picture>
-  <source media="(prefers-color-scheme: dark)" srcset="img/cozystack-logo-white.svg">
-  <img src="img/cozystack-logo-black.svg" alt="Cozystack" width="340">
-</picture>
+<img src="img/cozystack-logo-black.svg#gh-light-mode-only" alt="Cozystack" width="340">
+<img src="img/cozystack-logo-white.svg#gh-dark-mode-only" alt="Cozystack" width="340">
 
 [![GitHub Release](https://img.shields.io/github/release/cozystack/cozystack.svg?style=flat)](https://github.com/cozystack/cozystack/releases/latest)
 [![Apache-2.0 License](https://img.shields.io/github/license/cozystack/cozystack)](https://github.com/cozystack/cozystack/blob/main/LICENSE)
-[![Commit activity](https://img.shields.io/github/commit-activity/y/cozystack/cozystack)](https://github.com/cozystack/cozystack/graphs/contributors)
+[![Commit activity](https://img.shields.io/github/commit-activity/y/cozystack/cozystack)](https://github.com/cozystack/cozystack/graphs/commit-activity)
 [![OpenSSF Best Practices](https://www.bestpractices.dev/projects/10177/badge)](https://www.bestpractices.dev/projects/10177)
 [![OpenSSF Scorecard](https://api.securityscorecards.dev/projects/github.com/cozystack/cozystack/badge)](https://securityscorecards.dev/viewer/?uri=github.com/cozystack/cozystack)
+[![CLOMonitor](https://img.shields.io/endpoint?url=https://clomonitor.io/api/projects/cncf/cozystack/badge)](https://clomonitor.io/projects/cncf/cozystack)
 [![Support](https://img.shields.io/badge/$-support-12a0df.svg?style=flat)](https://cozystack.io/support/)
 
 # Cozystack
 
-**Cozystack** is a free platform and framework for building clouds.
+**Cozystack** is a free and open-source platform and framework for building clouds.
 
-Cozystack is a [CNCF Sandbox Level Project](https://www.cncf.io/sandbox-projects/) that was originally built and sponsored by [Ænix](https://aenix.io/).
+Cozystack is a [CNCF Sandbox project](https://www.cncf.io/sandbox-projects/) that was originally built and sponsored by [Ænix](https://aenix.io/).
 
 With Cozystack, you can transform a bunch of servers into an intelligent system with a simple REST API for spawning Kubernetes clusters,
 Database-as-a-Service, virtual machines, load balancers, HTTP caching services, and other services with ease.
@@ -34,7 +33,6 @@ You can use Cozystack as a platform to build a private cloud powered by Infrastr
 * [**Using Cozystack as a Kubernetes distribution**](https://cozystack.io/docs/guides/use-cases/kubernetes-distribution/)  
 You can use Cozystack as a Kubernetes distribution for Bare Metal
 
-
 ## Documentation
 
 The documentation is located on the [cozystack.io](https://cozystack.io) website.
@@ -45,10 +43,10 @@ If you encounter any difficulties, start with the [troubleshooting guide](https:
 
 ## Versioning
 
-Versioning adheres to the [Semantic Versioning](http://semver.org/) principles.  
+Versioning adheres to the [Semantic Versioning](https://semver.org/) principles.  
 A full list of the available releases is available in the GitHub repository's [Release](https://github.com/cozystack/cozystack/releases) section.
 
-- [Roadmap](https://cozystack.io/docs/roadmap/)
+- [Roadmap](ROADMAP.md)
 
 ## Contributions
 
@@ -57,16 +55,28 @@ Contributions are highly appreciated and very welcomed!
 In case of bugs, please check if the issue has already been opened by checking the [GitHub Issues](https://github.com/cozystack/cozystack/issues) section.
 If it isn't, you can open a new one. A detailed report will help us replicate it, assess it, and work on a fix.
 
-You can express your intention to on the fix on your own.
+You are welcome to take the fix on yourself.
 Commits are used to generate the changelog, and their author will be referenced in it.
 
 If you have a **concrete feature request**, [open an issue](https://github.com/cozystack/cozystack/issues/new/choose). For a **cross-cutting or architectural change**, open a [design proposal](https://github.com/cozystack/community/tree/main/design-proposals) in the [community](https://github.com/cozystack/community) repo. For **questions or early ideas**, use [GitHub Discussions](https://github.com/cozystack/cozystack/discussions). See [CONTRIBUTING.md](CONTRIBUTING.md#where-do-i-file) for the full routing.
 
 ## Community
 
-You are welcome to join our [Telegram group](https://t.me/cozystack) and come to our weekly community meetings.
+You are welcome to join us in [#cozystack on CNCF Slack](https://cloud-native.slack.com/archives/C08BQJD95J7) or [#cozystack on Kubernetes Slack](https://kubernetes.slack.com/archives/C06L3CPRVN1), join our [Telegram group](https://t.me/cozystack), and come to our community meetings.
 Add them to your [Google Calendar](https://calendar.google.com/calendar?cid=ZTQzZDIxZTVjOWI0NWE5NWYyOGM1ZDY0OWMyY2IxZTFmNDMzZTJlNjUzYjU2ZGJiZGE3NGNhMzA2ZjBkMGY2OEBncm91cC5jYWxlbmRhci5nb29nbGUuY29t) or [iCal](https://calendar.google.com/calendar/ical/e43d21e5c9b45a95f28c5d649c2cb1e1f433e2e653b56dbbda74ca306f0d0f68%40group.calendar.google.com/public/basic.ics) for convenience.
 
+## Project documents
+
+| | |
+|---|---|
+| [Governance](GOVERNANCE.md) | How decisions are made and who makes them |
+| [Contributor Ladder](CONTRIBUTOR_LADDER.md) | How to grow from contributor to maintainer |
+| [Maintainers](MAINTAINERS.md) | Who maintains the project |
+| [Code of Conduct](CODE_OF_CONDUCT.md) | What we expect of each other |
+| [Security Policy](SECURITY.md) | Reporting a vulnerability, and which releases get fixes |
+| [Adopters](ADOPTERS.md) | Who runs Cozystack in production |
+| [Roadmap](ROADMAP.md) | Where the project is going |
+
 ## License
 
 Cozystack is licensed under Apache 2.0.