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/projman/skills/wiki-conventions.md

@@ -0,0 +1,155 @@
+---
+name: wiki-conventions
+description: Proposal and implementation page format and naming conventions
+---
+
+# Wiki Conventions
+
+## Purpose
+
+Defines the naming and structure for wiki proposal and implementation pages.
+
+## When to Use
+
+- **Planner agent**: When creating wiki pages during planning
+- **Orchestrator agent**: When updating status at sprint close
+- **Commands**: `/sprint-plan`, `/sprint-close`, `/proposal-status`
+
+---
+
+## Page Naming
+
+| Page Type | Naming Convention |
+|-----------|-------------------|
+| Proposal | `Change VXX.X.X: Proposal` |
+| Implementation | `Change VXX.X.X: Proposal (Implementation N)` |
+
+**Examples:**
+- `Change V4.1.0: Proposal`
+- `Change V4.1.0: Proposal (Implementation 1)`
+- `Change V4.1.0: Proposal (Implementation 2)`
+
+---
+
+## Proposal Page Template
+
+```markdown
+> **Type:** Change Proposal
+> **Version:** V04.1.0
+> **Plugin:** projman
+> **Status:** In Progress
+> **Date:** 2026-01-26
+
+# Feature Title
+
+[Content migrated from input source or created from discussion]
+
+## Implementations
+- [Implementation 1](link) - Sprint 17 - In Progress
+```
+
+---
+
+## Implementation Page Template
+
+```markdown
+> **Type:** Change Proposal Implementation
+> **Version:** V04.1.0
+> **Status:** In Progress
+> **Date:** 2026-01-26
+> **Origin:** [Proposal](wiki-link)
+> **Sprint:** Sprint 17
+
+# Implementation Details
+
+[Technical details, scope, approach]
+
+## Issues
+- #45: JWT token generation
+- #46: Login endpoint
+- #47: Auth tests
+```
+
+---
+
+## Status Values
+
+| Status | Meaning |
+|--------|---------|
+| `In Progress` | Active work |
+| `Implemented` | Completed successfully |
+| `Partial` | Partially completed, continued in next impl |
+| `Failed` | Did not complete, abandoned |
+
+---
+
+## Completion Update (Sprint Close)
+
+On sprint close, update implementation page:
+
+```markdown
+> **Type:** Change Proposal Implementation
+> **Version:** V04.1.0
+> **Status:** Implemented ✅
+> **Date:** 2026-01-26
+> **Completed:** 2026-01-28
+> **Origin:** [Proposal](wiki-link)
+> **Sprint:** Sprint 17
+
+# Implementation Details
+[Original content...]
+
+## Completion Summary
+- All planned issues completed
+- Lessons learned: [Link to lesson]
+```
+
+---
+
+## Proposal Status Update
+
+When all implementations complete, update proposal:
+
+```markdown
+> **Type:** Change Proposal
+> **Version:** V04.1.0
+> **Status:** Implemented ✅
+> **Date:** 2026-01-26
+
+# Feature Title
+[Original content...]
+
+## Implementations
+- [Implementation 1](link) - Sprint 17 - ✅ Completed
+```
+
+---
+
+## Creating Pages
+
+**Create proposal:**
+```python
+create_wiki_page(
+    repo="org/repo",
+    title="Change V4.1.0: Proposal",
+    content="[proposal template content]"
+)
+```
+
+**Create implementation:**
+```python
+create_wiki_page(
+    repo="org/repo",
+    title="Change V4.1.0: Proposal (Implementation 1)",
+    content="[implementation template content]"
+)
+```
+
+**Update implementation on close:**
+```python
+update_wiki_page(
+    repo="org/repo",
+    page_name="Change-V4.1.0:-Proposal-(Implementation-1)",
+    content="[updated content with completion status]"
+)
+```