feat(create-app): add template vanilla-ts

[HenryVogt]

According to the other templates it might be a helpful addition to have a vanilla typescript template aswell.

[yyx990803]

Hmm, I'm not sure if this is even necessary since it really just needs a tsconfig.json on top of vanilla. But thanks for the PR anyway!

[elwynelwyn]

I tried to use vanilla-ts as I expected it to exist based on the other templates, and came looking here when I realised it doesn't exist. Just a +1 on wanting this template to exist!

Aside from my mismatched expectations causing a bump in my otherwise smooth Vite onboarding, I think it's worth noting it's not just adding a tsconfig.json (and going and looking up which values I need to paste in), it's also renaming main.js -> main.ts, going into index.html and renaming the src to point at .ts. Sure, all simple and trivial stuff, but I've done that 5 or 6 times today when scaffolding out modules and it's pretty tedious

[WuTheFWasThat]

agree would've been nice to have! (although it's also great that it works with such minimal changes from vanilla)

[antfu]

Maybe we can reconsider having this template?

We are having a few contributors request this again #2814, #2849

I think not only this could help ppl to get started quickly without doing the .js -> .ts renaming repeatedly, but also as an example showing ppl that "we support ts out-of-box, so you don't need to dig in and make the complex setup to get it work".

[antfu]

Also think we should adapt "build": "tsc && vite build" from #2849

[antfu]

I am going to make changes to this PR directly and push this thing ready for merging.

[HenryVogt]

Thanks for taking my proposal into the project. Unfortunatly I was somehow not notified about the further discussions, so please excuse me for not taking part in the conversation.

[patak-cat]

Not a problem @HenryVogt, thanks for the PR!