Align bevy_input::Touch API with other similar APIs

[ambeeeeee]

With the recent changes to APIs in Time and Timer, I came across Touch which would benefit from the same change. Upon code approval I can add it to the changelog.

My last PR randomly killed itself when I was messing with the git history, odd.

[CleanCut]

Seems consistent with the Timer changes.

Should delta and distance also be marked #[inline] for consistency?

[ambeeeeee]

Seems consistent with the Timer changes.

Should delta and distance also be marked #[inline] for consistency?

I decided not to immediately since they're not simple getters and setters, but we'll see what @cart thinks.

[cart]

Yeah whether or not to inline is always an interesting question. I think we should only "always default" to inlining simple field accesses. Everything else should probably be informed by benchmarks (both perf and compile time).

[CleanCut]

Yeah whether or not to inline is always an interesting question. I think we should only "always default" to inlining simple field accesses. Everything else should probably be informed by benchmarks (both perf and compile time).

Great, it's nice to have a guideline. 👍