feat(windows): add Windows support Phase 2 - cleanup features

Add cleanup modules and command scripts for Windows:
- lib/clean: user, caches, dev, apps, system cleanup modules
- bin/clean: deep cleanup orchestrator with dry-run and whitelist
- bin/uninstall: interactive app uninstaller
- bin/optimize: system optimization and health checks
- bin/purge: project artifact cleanup

All scripts support dry-run mode and follow safe deletion practices.

.gitignore

@@ -65,3 +65,6 @@ bin/status-darwin-*
 tests/tmp-*/
 tests/*.tmp
 tests/*.log
+
+session.json
+run_tests.ps1