feat: v3.0.0 architecture overhaul

- Rename marketplace to lm-claude-plugins
- Move MCP servers to root with symlinks
- Add 6 PR tools to Gitea MCP (list_pull_requests, get_pull_request,
  get_pr_diff, get_pr_comments, create_pr_review, add_pr_comment)
- Add clarity-assist plugin (prompt optimization with ND accommodations)
- Add git-flow plugin (workflow automation)
- Add pr-review plugin (multi-agent review with confidence scoring)
- Centralize configuration docs
- Update all documentation for v3.0.0

BREAKING CHANGE: MCP server paths changed, marketplace renamed

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

plugins/clarity-assist/claude-md-integration.md

@@ -0,0 +1,58 @@
+# clarity-assist - CLAUDE.md Integration
+
+Add the following section to your project's CLAUDE.md file to enable clarity-assist.
+
+---
+
+## Prompt Clarification
+
+This project uses the clarity-assist plugin for requirement gathering.
+
+### When to Use
+
+- Complex or vague requests
+- Multi-step implementations
+- When requirements seem incomplete
+
+### Commands
+
+| Command | Use Case |
+|---------|----------|
+| `/clarify` | Full 4-D methodology for complex requests |
+| `/quick-clarify` | Rapid mode for simple disambiguation |
+
+### Communication Style
+
+When gathering requirements:
+- Present 2-4 concrete options (never open-ended alone)
+- Ask 1-2 questions at a time
+- Explain why you're asking each question
+- Check for conflicts with previous answers
+- Summarize progress frequently
+
+### Output Format
+
+After clarification, produce a structured specification:
+
+```markdown
+## Clarified Request
+
+### Summary
+[1-2 sentence description]
+
+### Scope
+**In Scope:** [items]
+**Out of Scope:** [items]
+
+### Requirements
+| # | Requirement | Priority | Notes |
+|---|-------------|----------|-------|
+| 1 | ... | Must | ... |
+
+### Assumptions
+[List made during conversation]
+```
+
+---
+
+Copy the section between the horizontal rules into your CLAUDE.md.