Custom Passport.js strategies for unsupported OAuth providers

[NaderRNA]

Passport.js currently doesn't support:

• Airtable - https://airtable.com/developers/web/api/oauth-reference - note: Airtable only supports refresh tokens that last 60 days
• Salesforce - https://www.passportjs.org/packages/passport-forcedotcom/
• Snowflake - https://docs.snowflake.com/en/user-guide/oauth-custom
  As these are required for our implementation of OAuth I'll need to create custom strategies for these.
  This shouldn't be too bad it'll just hit the respective endpoints for OAuth, generate the redirect URL and redirect the user. Then handle the passport.js authorize funciton

ref #603 and PR #611

[NaderRNA]

https://www.npmjs.com/package/passport-custom