nx: Initialize nx (#5235)

* nx: Initialize nx
https://nx.dev/getting-started/adding-to-existing

* fix: Migrator ordering issue for vitest scripts

* nit: trailing newline

* deps: Updated select dependencies to fix Storybook with pnpm

* fix: Add explicit knip entry point for current workspace
...since it's not inferred from the script now.

pnpm-workspace.yaml

@@ -12,4 +12,5 @@ onlyBuiltDependencies:
   - '@playwright/browser-firefox'
   - '@playwright/browser-webkit'
   - esbuild
+  - nx
   - oxc-resolver