build: move larger scripts into tools dir in workspace (#10653)

Having the `scripts` dir re-use all packages from the top-level was
getting quite unwieldy. Created new `tools` directory that is part of
the workspace. Packages are exported with the `@tools` package
namespace.

test/jest.setup.js

@@ -1,3 +1,4 @@
+import { jest } from '@jest/globals'
 import console from 'console'
 global.console = console