Adds Keycloak OAuth provider

[infomiho]

• Adds the Keycloak OAuth provider using Arctic.
• It extends all of the place where we had Google and Github to include Keycloak (icons, buttons, Wasp Studio etc.)

Left to do

• Update the docs to include Keycloak info

    [ Server ] {
    [ Server ]   profile: {
    [ Server ]     sub: '5adba8fc-3ea6-445a-a379-13f0bb0b6969',
    [ Server ]     email_verified: true,
    [ Server ]     name: 'Test User',
    [ Server ]     preferred_username: 'test',
    [ Server ]     given_name: 'Test',
    [ Server ]     family_name: 'User',
    [ Server ]     email: 'test@example.com'
    [ Server ]   }
    [ Server ] }

• Update Keycloak impl to match the latest impl of other providers

[sodic]

All good, found only a couple of small docs errors to correct (and some suggestions you can consider).

Other than that, LGTM.

[sodic]

I don't have any specific comments (besides the discussion we're having here: #1851 (comment)

[sodic]

I think you should import React.

[infomiho]

Types work just fine even without importing it, I've just tested it

[sodic]

Hm, strange. But if everything works (hope you checked build), then no problem.

I'd still probably do:

import { ReactNode } from 'react';

But it's just a matter of personal style.

[infomiho]

I'll merge this after we merge the Google and Github changes and docs.

[sodic]

LGTM