refactor(projman): extract skills and consolidate commands

Major refactoring of projman plugin architecture:

Skills Extraction (17 new files):
- Extracted reusable knowledge from commands and agents into skills/
- branch-security, dependency-management, git-workflow, input-detection
- issue-conventions, lessons-learned, mcp-tools-reference, planning-workflow
- progress-tracking, repo-validation, review-checklist, runaway-detection
- setup-workflows, sprint-approval, task-sizing, test-standards, wiki-conventions

Command Consolidation (17 → 12 commands):
- /setup: consolidates initial-setup, project-init, project-sync (--full/--quick/--sync)
- /debug: consolidates debug-report, debug-review (report/review modes)
- /test: consolidates test-check, test-gen (run/gen modes)
- /sprint-status: absorbs sprint-diagram via --diagram flag

Architecture Cleanup:
- Remove plugin-level mcp-servers/ symlinks (6 plugins)
- Remove plugin README.md files (12 files, ~2000 lines)
- Update all documentation to reflect new command structure
- Fix documentation drift in CONFIGURATION.md, COMMANDS-CHEATSHEET.md

Commands are now thin dispatchers (~20-50 lines) that reference skills.
Agents reference skills for domain knowledge instead of inline content.

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

plugins/code-sentinel/README.md

@@ -1,47 +0,0 @@
-# code-sentinel
-
-Security scanning and code refactoring tools for Claude Code projects.
-
-## Features
-
-### Security Scanning
-- **PreToolUse Hook**: Catches vulnerabilities BEFORE code is written
-- **Full Audit**: `/security-scan` for comprehensive project review
-- **Pattern Detection**: SQL injection, XSS, command injection, secrets, and more
-
-### Refactoring
-- **Pattern Library**: Extract method, simplify conditionals, modernize syntax
-- **Safe Transforms**: Preview changes before applying
-- **Reference Updates**: Automatically updates all call sites
-
-## Commands
-
-| Command | Description |
-|---------|-------------|
-| `/security-scan` | Full project security audit |
-| `/refactor <target>` | Apply refactoring with pattern |
-| `/refactor-dry <target>` | Preview opportunities without changes |
-
-## Hooks
-
-- **PreToolUse (Write\|Edit)**: Scans code for security patterns before writing
-
-## Security Patterns Detected
-
-| Category | Examples |
-|----------|----------|
-| Injection | SQL, Command, Code (eval), XSS |
-| Secrets | Hardcoded API keys, passwords |
-| Deserialization | Pickle, unsafe YAML |
-| Path Traversal | Unsanitized file paths |
-
-## Installation
-
-```bash
-/plugin marketplace add https://gitea.hotserv.cloud/personal-projects/leo-claude-mktplace.git
-/plugin install code-sentinel
-```
-
-## Integration
-
-See claude-md-integration.md for CLAUDE.md additions.