feat(): enable custom domain usage (#9911)

# Content
- Introduce the `workspaceUrls` property. It contains two
sub-properties: `customUrl, subdomainUrl`. These endpoints are used to
access the workspace. Even if the `workspaceUrls` is invalid for
multiple reasons, the `subdomainUrl` remains valid.
- Introduce `ResolveField` workspaceEndpoints to avoid unnecessary URL
computation on the frontend part.
- Add a `forceSubdomainUrl` to avoid custom URL using a query parameter

packages/twenty-front/src/modules/auth/graphql/queries/checkUserExists.ts

@@ -9,8 +9,10 @@ export const CHECK_USER_EXISTS = gql`
         availableWorkspaces {
           id
           displayName
-          subdomain
-          hostname
+          workspaceUrls {
+            subdomainUrl
+            customUrl
+          }
           logo
           sso {
             type