feat: Add repliedTo functionality for comments, enabling nested replies and enhancing comment structure

Author: Adnanarodiya

drizzle/0013_black_vargas.sql

@@ -0,0 +1,2 @@
+ALTER TABLE "app_comment" ADD COLUMN "repliedToId" integer;--> statement-breakpoint
+ALTER TABLE "app_comment" ADD CONSTRAINT "app_comment_repliedToId_app_user_id_fk" FOREIGN KEY ("repliedToId") REFERENCES "public"."app_user"("id") ON DELETE cascade ON UPDATE no action;