[Enhancement]: Make third-party services optional for self-hosting

[MatthewL246]

Checked Existing

• [X] I have checked the repository for duplicate issues.

What enhancement would you like to see?

Currently, the server requires API keys for various third-party services (Stripe, GitHub, and Discord) to run. These services should be optional for contributors and self-hosters.

Any other details to share? (OPTIONAL)

No response

[MiniBioOne]

Something like the DisabledFeatures system in BOSS/Account could be used here.