Add types to scripts and config files

Summary:
Now that we have some TypeScript infra set up, move scripts (mainly the benchmarking one) and config files to TypeScript.

Starts to move away a bit from the magic globals used in the JS environment.

Differential Revision: D45511176

fbshipit-source-id: 541b967a276d2894e68b505169fc69096589d8c4

javascript/package.json

@@ -43,6 +43,10 @@
     "@babel/eslint-parser": "^7.19.1",
     "@babel/preset-env": "^7.20.2",
     "@babel/preset-typescript": "^7.21.4",
+    "@types/glob": "^8.1.0",
+    "@types/jest": "^29.5.1",
+    "@types/node": "^16.18.25",
+    "@types/which": "^3.0.0",
     "@typescript-eslint/eslint-plugin": "^5.30.5",
     "@typescript-eslint/parser": "^5.30.5",
     "clang-format": "^1.8.0",
@@ -54,6 +58,7 @@
     "jest": "^29.3.1",
     "just-scripts": "^2.1.0",
     "prettier": "^2.4.1",
+    "ts-node": "^10.9.1",
     "typescript": "5.0.4",
     "which": "^3.0.0"
   }