feat(db): add @atomcms/db package skeleton + mysql2/drizzle client

packages/db/package.json

@@ -0,0 +1,22 @@
+{
+  "name": "@atomcms/db",
+  "version": "0.0.0",
+  "private": true,
+  "type": "module",
+  "main": "./src/index.ts",
+  "types": "./src/index.ts",
+  "scripts": {
+    "test": "vitest run",
+    "typecheck": "tsc --noEmit",
+    "db:pull": "drizzle-kit pull"
+  },
+  "dependencies": {
+    "drizzle-orm": "^0.38.0",
+    "mysql2": "^3.11.0"
+  },
+  "devDependencies": {
+    "drizzle-kit": "^0.30.0",
+    "typescript": "^5.7.0",
+    "vitest": "^2.1.0"
+  }
+}