chore: add root typescript dev dependency

package-lock.json

@@ -19,7 +19,8 @@
         "eslint-plugin-prettier": "^5.2.1",
         "globals": "^15.12.0",
         "prettier": "^3.3.3",
-        "supertest": "^7.0.0"
+        "supertest": "^7.0.0",
+        "typescript": "^5.9.3"
       }
     },
     "node_modules/@ampproject/remapping": {
@@ -7583,6 +7584,20 @@
         "is-typedarray": "^1.0.0"
       }
     },
+    "node_modules/typescript": {
+      "version": "5.9.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.3.tgz",
+      "integrity": "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "bin": {
+        "tsc": "bin/tsc",
+        "tsserver": "bin/tsserver"
+      },
+      "engines": {
+        "node": ">=14.17"
+      }
+    },
     "node_modules/undici-types": {
       "version": "5.26.5",
       "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-5.26.5.tgz",