chore: refactor utils (#9053)

This PR

- renames the `utils` folder to `tools` (follows internal practice),
- migrates the contents of `scripts` into `tools` and removes scripts.

tools/tsconfig.json

@@ -0,0 +1,4 @@
+{
+  "extends": "../tsconfig.base.json",
+  "files": ["../package.json"]
+}