package-manager: migrate to apk-tools JSON API

package-manager: migrate to apk-tools JSON API

Replace legacy opkg status parsing with native apk-tools JSON queries.
This modernizes the backend calls and improves dependency resolution.

- Implement 'apk query --format json' for package data retrieval.
- Add robust regex for versioned dependencies (e.g., name>=version).
- Update version comparison to handle APK date-based revisions.
- Fix label-input associations to resolve accessibility warnings.
- Retain deprecated opkg fallback logic for LuCI master.

Signed-off-by: Konstantin Glukhov <redacted>