How can I add functionality on the menu ?

[Vesloo]

Hello, I've been searching for hours for how I can modify and add functionality, I know how to code the functionality but not how to add it in the code...

I tried to add a migration, modify the types.ts file inside the supabase folder but it seems that the types.ts is regenerated back to default everytime I modify it.

Help would be very nice !

Thank you.