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/api/@generated/comment-thread-target/comment-thread-target-scalar-field.enum.ts

@@ -0,0 +1,16 @@
+import { registerEnumType } from '@nestjs/graphql';
+
+export enum CommentThreadTargetScalarFieldEnum {
+  id = 'id',
+  createdAt = 'createdAt',
+  updatedAt = 'updatedAt',
+  deletedAt = 'deletedAt',
+  commentThreadId = 'commentThreadId',
+  commentableType = 'commentableType',
+  commentableId = 'commentableId',
+}
+
+registerEnumType(CommentThreadTargetScalarFieldEnum, {
+  name: 'CommentThreadTargetScalarFieldEnum',
+  description: undefined,
+});