- Set APPDATA/LOCALAPPDATA env vars for Windows so cbm_app_config_dir()
and cbm_app_local_dir() resolve to FAKE_HOME paths
- Add Windows (*.exe) branches for Zed, KiloCode, VSCode config checks
- Add macOS branch for KiloCode (was hardcoded to .config/ on all platforms)
- Create platform-correct detection dirs (AppData on Windows, Library on
macOS, .config on Linux) so agent detection + install paths match
- Update skill check from old 4-skill names to consolidated codebase-memory
(old dirs are cleaned up during install since skill consolidation)