Add comments to Prisma Schema and GraphQL server (#162)

* Lowercase all relations in prisma/graphql schema

* Add Comments data model and graphql schema

* Make comments availalble on the api through resolvers and guard them

* Update front graphql schema

* Fix PR

server/src/auth/services/auth.service.ts

@@ -98,7 +98,7 @@ export class AuthService {
     }
 
     const workspace = await this.workspaceRepository.findFirst({
-      where: { WorkspaceMember: { every: { userId: user.id } } },
+      where: { workspaceMember: { some: { userId: user.id } } },
     });
 
     if (!workspace) {