Add more social providers to Wasp Auth

[Martinsos]

Request for TikTok: #1996

We also got requests for bunch of other social providers, most prominent being LinkedIn, Twitter and TikTok.

We want to add a bunch of these (which will be quite easier now that we have Arctic integrated), and we also want to refactor the code so it is easier to keep adding more of the in the future.

We might even want to enable users to be able to define their own social auth provider ("custom oauth provider") -> let's look into opening a separate issue for this (TODO).

[Martinsos]

Thanks @Reikon95! I moved this to issues as it is easier for us to track this way, and we will be adding this at some point for sure!

[Martinsos]

Some more feedback from the user from Discord:

• Support for saml/sso or bring your own provider

I would imagine an saas that deals with b2b would need to have this to login from client's okta or something. This might be a deal breaker for consideration when really building a saas startup