Bevy Input Docs : the modules

[tguichaoua]

Objective

Complete the documentation of bevy_input (#3492).

This PR is part of a triptych of PRs :

• Bevy Input Docs : lib.rs #9468
• Bevy Input Docs : gamepad.rs #9469

Solution

Add documentation on modules in bevy_input.

[github-actions]

Example alien_cake_addict failed to run, please try running it locally and check the result.

[killercup]

Always nice to see more docs :) I would ask for more examples to see what this is used for but I don't think the module docs are the right place necessarily

[killercup]

I understand the module docs are not very important but this tells me about as much as the name of the module 😅 What is this axis type used for?

[tguichaoua]

I don't see what to put here since items of the modules already have relevant docs.
This docs is only here for being able to add #![warn(missing_docs)] on bevy_input.

[alice-i-cecile]

Can you add warn(missing_docs) to the crate in this PR and then I'll merge them all in order for you?

[tguichaoua]

@alice-i-cecile Done 👌

[alice-i-cecile]

Alright, let's see if that works via the merge queue! I'll do them sequentially if it fails.

[alice-i-cecile]

Alright, let's see if this passes now that the other two PRs are merged.

[tguichaoua]

@alice-i-cecile
Auto-merge fails because of a conflict, should be fixed now.