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/README.md

@@ -0,0 +1,99 @@
+# clarity-assist
+
+Prompt optimization and requirement clarification plugin with neurodivergent-friendly accommodations.
+
+## Overview
+
+clarity-assist helps transform vague, incomplete, or ambiguous requests into clear, actionable specifications. It uses a structured 4-D methodology (Deconstruct, Diagnose, Develop, Deliver) and ND-friendly communication patterns.
+
+## Commands
+
+| Command | Description |
+|---------|-------------|
+| `/clarify` | Full 4-D prompt optimization for complex requests |
+| `/quick-clarify` | Rapid single-pass clarification for simple requests |
+
+## Features
+
+### 4-D Methodology
+
+1. **Deconstruct** - Break down the request into components
+2. **Diagnose** - Analyze gaps and potential issues
+3. **Develop** - Gather clarifications through structured questions
+4. **Deliver** - Produce refined specification
+
+### ND-Friendly Design
+
+- **Option-based questioning** - Always provide 2-4 concrete choices
+- **Chunked questions** - Ask 1-2 questions at a time
+- **Context for questions** - Explain why you're asking
+- **Conflict detection** - Check previous answers before new questions
+- **Progress acknowledgment** - Summarize frequently
+
+### Escalation Protocol
+
+When requests are complex or users seem overwhelmed:
+- Acknowledge complexity
+- Offer to focus on one aspect at a time
+- Build incrementally
+
+## Installation
+
+Add to your project's `.claude/settings.json`:
+
+```json
+{
+  "plugins": ["clarity-assist"]
+}
+```
+
+## Usage
+
+### Full Clarification
+
+```
+/clarify
+
+[Your vague or complex request here]
+```
+
+### Quick Clarification
+
+```
+/quick-clarify
+
+[Your mostly-clear request here]
+```
+
+## Configuration
+
+No configuration required. The plugin uses sensible defaults.
+
+## Output Format
+
+After clarification, you receive a structured specification:
+
+```markdown
+## Clarified Request
+
+### Summary
+[Description of what will be built]
+
+### Scope
+**In Scope:** [items]
+**Out of Scope:** [items]
+
+### Requirements
+[Prioritized table]
+
+### Assumptions
+[List of assumptions]
+```
+
+## Integration
+
+For CLAUDE.md integration instructions, see `claude-md-integration.md`.
+
+## License
+
+MIT