Upgrade jiti dependency to stable (#15043)

This PR updates the `jiti` dependency we use for plugin loading to the
latest stable release.

## Test Plan

This was relying on integration tests which contains example of
TypeScript configs. It's also rebased to include the new examples from
#15041.

Author: philipp-spiess

packages/@tailwindcss-node/package.json

@@ -38,7 +38,7 @@
   },
   "dependencies": {
     "enhanced-resolve": "^5.17.1",
-    "jiti": "^2.0.0-beta.3",
+    "jiti": "^2.4.0",
     "tailwindcss": "workspace:*"
   }
 }