Add Husky pre-commit with eslint and Sentry env convention (M0).

Co-authored-by: Cursor <cursoragent@cursor.com>

package.json

@@ -12,7 +12,19 @@
     "start": "tsx src/index.ts",
     "build": "npm --prefix web install && npm --prefix web run build",
     "typecheck": "tsc --noEmit && npm --prefix web run typecheck",
-    "test": "node scripts/run-tests.mjs"
+    "test": "node scripts/run-tests.mjs",
+    "lint": "eslint .",
+    "prepare": "husky"
+  },
+  "lint-staged": {
+    "src/**/*.ts": [
+      "eslint --fix",
+      "prettier --write"
+    ],
+    "web/src/**/*.{ts,tsx}": [
+      "eslint --fix",
+      "prettier --write"
+    ]
   },
   "dependencies": {
     "express": "^4.21.2",
@@ -21,11 +33,19 @@
     "ws": "^8.18.0"
   },
   "devDependencies": {
+    "@eslint/js": "^9.18.0",
     "@types/express": "^4.17.21",
     "@types/node": "^22.10.5",
     "@types/swagger-ui-express": "^4.1.8",
     "@types/ws": "^8.5.13",
+    "eslint": "^9.18.0",
+    "eslint-plugin-react-hooks": "^5.1.0",
+    "globals": "^15.14.0",
+    "husky": "^9.1.7",
+    "lint-staged": "^16.4.0",
     "openapi-types": "^12.1.3",
-    "typescript": "^5.7.3"
+    "prettier": "^3.8.3",
+    "typescript": "^5.7.3",
+    "typescript-eslint": "^8.26.0"
   }
 }