backstage release v0.127.0

Added

• Allow customization of theme colors via app.branding.theme configuration.
• Make AI-chat skills configurable per deployment via aiChat.skills (opt out of bundled skills with bundled: false, load extra skills from a directory with dir, or define them inline with inline).

Fixed

• Make the sqlite-persistence CI test case (ci-values-case3-sqlite-persistent.yaml) inject a real backend.database.connection.directory override and update the surrounding comment so it reflects what current Backstage actually accepts. The previous comment suggested connection: /var/lib/backstage/db.sqlite, which the Sqlite3Connector rejects at runtime with "connection.filename" is not supported for the base sqlite connection. See ./docs/releases/v0.127.0-changelog.md for more information.