MCP Debugger

feat(tests): implement test reliability improvements (Tasks 24-27) BREAKING CHANGE: Tests now fail loudly when dependencies are missing - Remove all conditional test skips enforcing "fail loudly" philosophy - Add test filtering capabilities for CI environments - test:no-python - skip Python-dependent tests - test:no-docker - skip Docker-dependent tests - test:ci - alias for test:no-docker - Refactor session manager for multi-language support - Generic executable path resolution (not Python-specific) - Better error handling and logging - Update mock adapter with improved process handling - Remove obsolete tests and temporary files - Deleted session-manager-backup.ts (temporary recovery) - Removed python-real-discovery.test.ts (redundant) - Removed path-resolution.test.ts (obsolete) - Add comprehensive documentation for test improvements - Fix container test reliability with proper cleanup All 808 tests now pass without skips when dependencies are available. Philosophy: Tests explicitly fail when dependencies are missing rather than being silently skipped. Use test:no-python or test:no-docker scripts only in CI environments where specific dependencies are unavailable. Refs: Tasks 24, 25, 26, 27