feat(WHE-27): add drizzle db package and typed env config

packages/db/package.json

@@ -0,0 +1,16 @@
+{
+  "name": "@household/db",
+  "private": true,
+  "type": "module",
+  "scripts": {
+    "build": "bun build src/index.ts --outdir dist --target bun",
+    "typecheck": "tsgo --project tsconfig.json --noEmit",
+    "test": "bun test --pass-with-no-tests",
+    "lint": "oxlint \"src\""
+  },
+  "dependencies": {
+    "@household/config": "workspace:*",
+    "drizzle-orm": "^0.44.5",
+    "postgres": "^3.4.7"
+  }
+}