docs(readme): consolidate Community Friends sections and fix ToC anchors

- Merge duplicate 🤝 Community Friends section (table format near bottom) into
  the existing 🛠️ Community Friends section (bullet list)
- Add cc-sdd entry alongside Spec Kit Assistant
- Update intro text to 'Community projects that extend, visualize, or build on Spec Kit'
- Fix ToC anchors for Video Overview and Community Friends (remove variation selector from fragment)

Author: mnriem

README.md

@@ -177,7 +177,9 @@ See Spec-Driven Development in action across different scenarios with these comm
 
 ## 🛠️ Community Friends
 
-Community-built tools that integrate with Spec Kit to enhance the SDD workflow:
+Community projects that extend, visualize, or build on Spec Kit:
+
+- **[cc-sdd](https://github.com/rhuss/cc-sdd)** - A Claude Code plugin that adds composable traits on top of Spec Kit with [Superpowers](https://github.com/obra/superpowers)-based quality gates, spec/code review, git worktree isolation, and parallel implementation via agent teams.
 
 - **[Spec Kit Assistant](https://marketplace.visualstudio.com/items?itemName=rfsales.speckit-assistant)** — A VS Code extension that provides a visual orchestrator for the full SDD workflow (constitution → specification → planning → tasks → implementation) with phase status visualization, an interactive task checklist, DAG visualization, and support for Claude, Gemini, GitHub Copilot, and OpenAI backends. Requires the `specify` CLI in your PATH.
 
@@ -784,14 +786,6 @@ rm gcm-linux_amd64.2.6.1.deb
 
 For support, please open a [GitHub issue](https://github.com/github/spec-kit/issues/new). We welcome bug reports, feature requests, and questions about using Spec-Driven Development.
 
-## 🤝 Community Friends
-
-Projects that extend, visualize, or build on Spec Kit:
-
-| Project | Description |
-|---------|-------------|
-| [cc-sdd](https://github.com/rhuss/cc-sdd) | Claude Code plugin that adds composable traits on top of Spec Kit: [Superpowers](https://github.com/obra/superpowers)-based quality gates, spec/code review, git worktree isolation, and parallel implementation via agent teams. |
-
 ## 🙏 Acknowledgements
 
 This project is heavily influenced by and based on the work and research of [John Lam](https://github.com/jflam).