Migration guide misses start app with plugin

[vandriesh]

3.x docs:

https://github.com/Code-Forge-Net/Remix-Dev-Tools/tree/v3.7.4?tab=readme-ov-file#cjs-remix-server-setup-remix-run-server-started-by-remix-dev

- "dev": "remix dev -c \"npm run dev:serve\"",
+ "old_dev": "remix dev -c \"npm run dev:serve\"",
+ "dev": "remix dev -c \"rdt-serve ./build/index.js\" --manual",

would've been nice to have it mentioned in the migration section - could saved few minutes ;-)

nonetheless , terrific job here

[AlemTuzlak]

Thank you, I forgot this part in the readme, will update.

[AlemTuzlak]

added it