Split connect profile schema into profile, membership, and invitation

Move OIDCProviderInfo type into base.graphql alongside its query field
in both connect and trust APIs, removing orphan oidc.graphql files.
Split connect profile.graphql into three domain files: profile (with
user mutations), membership, and invitation.

Signed-off-by: Émile Ré <emile@getprobo.com>

pkg/server/api/connect/v1/graphql/base.graphql

@@ -34,4 +34,9 @@ type Query {
     @session(required: OPTIONAL)
 }
 
+type OIDCProviderInfo {
+  name: String!
+  loginURL: String!
+}
+
 type Mutation