v0.9.7 - discord rpc fixes, code refactoring

• fix: discord rpc toggle
• fix: away check for discord
• code has been refactored with a new getProvider typings
• moved to new tray provider for future feature
• ytmd plugin library for later usage

Full Changelog: https://github.com/Venipa/ytmdesktop2/compare/v0.9.5...v0.9.7