feat: project refactoring - folder cleanup, governance, and automation

Project Structure Cleanup:
- Remove deprecated cmdb-assistant plugin
- Remove development output files (test scripts, status reports)
- Remove IDE-specific workspace files
- Create scripts/ directory for automation
- Create docs/architecture/ for Draw.io diagrams
- Create docs/workflows/ for workflow documentation
- Create .scratch/ directory for transient work

Governance & Documentation:
- Add File Creation Governance section to CLAUDE.md
- Add architecture diagram specifications (component-map, agent-workflow)
- Add docs/UPDATING.md with update workflow
- Update CHANGELOG.md with all changes

Installation Automation:
- Add scripts/setup.sh for initial installation
- Add scripts/post-update.sh for updates after git pull
- Add /initial-setup slash command

Maintenance:
- Update .gitignore with scratch directory
- Fix all project name references (use support-claude-mktplace)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

CHANGELOG.md

@@ -0,0 +1,44 @@
+# Changelog
+
+All notable changes to support-claude-mktplace will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
+
+## [Unreleased]
+
+### Added
+- Installation script (`scripts/setup.sh`) for new users
+- Post-update script (`scripts/post-update.sh`) for updates
+- Update documentation (`docs/UPDATING.md`)
+- `/initial-setup` slash command
+- File creation governance rules in CLAUDE.md
+- Architecture diagram specifications in `docs/architecture/`
+- `.scratch/` directory for transient work
+- `scripts/` directory for setup automation
+- `docs/architecture/` for Draw.io diagrams
+- `docs/workflows/` for workflow documentation
+
+### Changed
+- Reorganized documentation into `docs/references/`, `docs/architecture/`, `docs/workflows/`
+- Updated CLAUDE.md with file creation governance
+
+### Removed
+- Organization/workspace GID variable (no longer needed)
+- Deprecated `cmdb-assistant/` plugin
+- Development output files (test scripts, status reports)
+- IDE-specific workspace files
+- Stray files from project root
+
+## [0.1.0] - Initial Release
+
+### Added
+- projman plugin for sprint management
+- projman-pmo plugin structure (planned)
+- project-hygiene plugin for cleanup automation
+- Gitea MCP server
+- Wiki.js MCP server
+- 43-label taxonomy system
+- Lessons learned capture system
+- Hybrid configuration system (system + project level)
+- Three-agent model (planner, orchestrator, executor)
+- Branch-aware security model