feat: support app-scoped versioning for monorepos

[oflynned]

Summary

• add app_path support to scope version storage under an Android app or module
• add git_tag_prefix for app-specific release tags and outputs
• add path_filter no-op behavior for unrelated app changes
• expose release_action as released or skipped
• document multi-app workflow usage and path filtering constraints

Fixes #137

Tests

• npm run lint
• npm run typecheck
• npm test -- --runInBand
• npm run test:e2e