Add colorful title to Modals and change sucess installation text

[KewaiiGamer]

When installing Vencord a pop up shows saying it was successfully patched.

However it says in first line "If discord is still open, fully close it first" and this is a bit confusing and I actually thought the pop up was error.

While you could say this is my fault, my friend who installed before me and did not tell me anything about this pop up told me the same thing happened to him after I installed

I think it's important to have a good UX.

This PR will add option for color in Modal Titles as well change the text in the sucessfully installation modal.