Add with-router-typescript example

[Josehower]

Add new with router typescript example based on suggestions https://github.com/expo/examples/issues/412#issuecomment-1451489760

[DanHarman]

Is there any point in this when npx create-expo-app -t offers a typescript with router option, that also has a tab bar and a few example screens?

[mattwoodruff808]

I will say I would greatly appreciate this PR. I love expo-router, and have been having issues trying to implement TypeScript after spinning up npx create-expo-app@latest --example with-router. This would help me a ton!

[AndresdoSantos]

I already created the application and installed the TS even before starting to use expo-router, is there a way to type the routes?

[karlhorky]

is there a way to type the routes?

There is a discussion about typed props of a route here (originally an issue, but converted into a discussion):

• https://github.com/expo/router/discussions/272