docs(framework): drop contributors section, add 4 static badges

- Remove the Contributors section; contrib.rocks fails on a private repo
  and the plain link to the contributors graph adds no signal that the
  GitHub sidebar does not already show.
- Add four static shields that render regardless of repo visibility:
  Conventional Commits (matches commitlint enforcement), git hooks via
  lefthook (matches lefthook.yml), Built for Claude Code (audience
  signal), Maintained yes (status signal pointing at the commit log).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: blafourcade

README.md

@@ -2,6 +2,10 @@
 
 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](LICENSE)
 [![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg)](CONTRIBUTING.md)
+[![Conventional Commits](https://img.shields.io/badge/Conventional%20Commits-1.0.0-yellow.svg)](https://www.conventionalcommits.org/)
+[![Git hooks: lefthook](https://img.shields.io/badge/git%20hooks-lefthook-007ACC.svg)](https://lefthook.dev/)
+[![Built for Claude Code](https://img.shields.io/badge/built%20for-Claude%20Code-D97757.svg)](https://docs.anthropic.com/en/docs/claude-code)
+[![Maintained](https://img.shields.io/badge/maintained-yes-success.svg)](https://github.com/ai-driven-dev/aidd-framework/commits/main)
 
 <!-- TODO: re-enable these badges when the repo goes public; both shields.io and the GitHub Actions badge endpoint return "not found" while the repo is private:
 [![Latest Release](https://img.shields.io/github/v/release/ai-driven-dev/aidd-framework?include_prereleases&sort=semver)](https://github.com/ai-driven-dev/aidd-framework/releases)
@@ -66,15 +70,4 @@ To add or modify elements (agents, commands, rules, skills, or templates), see t
 
 By participating you agree to our [Code of Conduct](./CODE_OF_CONDUCT.md). For security issues, see [SECURITY.md](./SECURITY.md).
 
-## Contributors
-
-See the [contributors graph](https://github.com/ai-driven-dev/aidd-framework/graphs/contributors) on GitHub.
-
-<!-- TODO: when the repo goes public, swap this section back to the contrib.rocks mosaic:
-<a href="https://github.com/ai-driven-dev/aidd-framework/graphs/contributors">
-  <img src="https://contrib.rocks/image?repo=ai-driven-dev/aidd-framework" alt="aidd-framework contributors" />
-</a>
-contrib.rocks requires public repo access; it returns no image while the repo is private. -->
-
-
 ← [Back to main repo](https://github.com/ai-driven-dev/aidd/blob/main/README.md)