feat(ai): add ai chat to dashboard

packages/db/prisma/migrations/20250409203918_add_chat/migration.sql

@@ -0,0 +1,13 @@
+-- CreateTable
+CREATE TABLE "chats" (
+    "id" TEXT NOT NULL DEFAULT gen_random_uuid(),
+    "messages" JSONB NOT NULL,
+    "projectId" TEXT NOT NULL,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+
+    CONSTRAINT "chats_pkey" PRIMARY KEY ("id")
+);
+
+-- AddForeignKey
+ALTER TABLE "chats" ADD CONSTRAINT "chats_projectId_fkey" FOREIGN KEY ("projectId") REFERENCES "projects"("id") ON DELETE CASCADE ON UPDATE CASCADE;