feat(server): mobile oauth with custom scheme redirect uri (#1204)

* feat(server): support providers without support for custom schemas

* chore: unit tests

* chore: test mobile override

* chore: add details to the docs

server/libs/immich-config/src/immich-config.service.ts

@@ -20,6 +20,8 @@ const defaults: SystemConfig = Object.freeze({
     issuerUrl: '',
     clientId: '',
     clientSecret: '',
+    mobileOverrideEnabled: false,
+    mobileRedirectUri: '',
     scope: 'openid email profile',
     buttonText: 'Login with OAuth',
     autoRegister: true,