fix(terminal): update terminal packages URL and bootstrap packages

fix: 'tooling-api-impl:copyJarToAssets' is not declared as dependency…

… of :app tasks

fix: migrate to Nyx v2

chore: try to fix release asset not found issue in publish job

chore: use private signing key to sign APKs

Fixed : Missing layout files

Updated contribution guidelines

Updated ProGuard rules

Renamed version to 2.1.0-beta

Updated CHANGELOG