[feat-500] add Beatleader integration

[silentrald]

#500

• Auth flow (used OAuth2 PCKE)
• Show leaderboard when clicking on the RANKED capsule
• Check for authenticated routes that can be query important player details
• Translation for locales
• Finalize / Polish UI
• [Maintainer] Setup BEATLEADER_CLIENT_ID and BEATLEADER_REDIRECT_URI for env variables

[Optional] e2e testing with a bot / test account?

Authentication Flow

beatleader-auth.mp4

Leaderboard View

as of 1baab70

Notes

• Shouldn't be ready for 1.5.0 release.
• Needs ScoreSaber Integration to fully close the issue.
• Trying to avoid Singletons pattern and moving into a layered / interface based pattern (better testing and lifetime controls).
• Added integration testing / possibly e2e testing as well.
• Moved test and build config from package.json to jest.config.ts and electron-builder.ts for better typing.
• Added dotenv module to for custom env variables for development and production.

[sonarqubecloud]

Quality Gate failed

Failed conditions
B Reliability Rating on New Code (required ≥ A)

See analysis details on SonarCloud

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