Replace GitHub-only custom module installation with support for any Git
host (GitHub, GitLab, Bitbucket, self-hosted) and local file paths.
- Add parseSource() universal input parser (local paths, SSH, HTTPS with
deep path/subdir extraction for GitHub, GitLab, Gitea)
- Add resolveSource() coordinator: parse -> clone if URL -> detect
discovery vs direct mode (marketplace.json present or not)
- Clone-first approach eliminates host-specific raw URL fetching
- 3-level cache structure (host/owner/repo) with .bmad-source.json
metadata for URL reconstruction
- Local paths install directly without caching; localPath persisted in
manifest for quick-update source lookup
- Direct mode scans target directory for SKILL.md when no marketplace.json
- Fix version display bug where walk-up found parent repo marketplace.json
and reported wrong version for custom modules