Event badging submit API

[DesmondSanctity]

Summary:

• This PR adds a new feature for an endpoint that the frontend will use to submit and authorize event badging submission.
• This PR fixes [FEATURE]: Endpoint for submitting "In-Person Events" and "Virtual Events" Application forms  #48

Changes:

• /helpers/crypto.js - This file contains the helper functions for encrypting and decrypting the form input from the frontend as a state.
• /provider/event-github/auth.js - This file contains the OAuth for GitHub authorization and callback endpoint to enable users to create issues with their usernames.
• /provider/index.js - This is where the auth.js above is exported for use.
• /routes/index.js - This is where the new endpoints are added to existing routes.

Testing:

• Mock test the API with Postman with request body as an object containing title and body for storing the value of the event title and the issue body in markdown. both fields are strings.
• Test from the frontend forms for virtual and in-person events.

Additional Notes:
None