[input] Add gamepad support

[Big-Smarty]

Added controller support.
Abstracted input by adding the Input class, overarching both KeyboardMouseInputData and the also newly added GamepadInputData.

[IAmNotHanni]

Nice work! I think I will buy myself a controller just to check if it's working. Will review later

[IceflowRE]

👍

[IceflowRE]

Other things:
Can you rename the commits that they match our naming convention? See the Github Actions.
Ignore the failed building for now, it is broken, will see when i get time for that.

This will only support one Gamepad right? not multiple?

[IAmNotHanni]

@IceflowRE About multiple gamepads/joysticks: I just ordered several online. We should do it in another pull request pls.

[IAmNotHanni]

• Update docs

https://inexor-vulkan-renderer.readthedocs.io/en/latest/development/reference/keyboard-mouse-input.html
The reference page about input in the docs states:

Inexor does not support joysticks yet.

That's no longer true. Also, the ref pages needs to be renamed to "keyboard, mouse and joystick input"
Furthermore, the docs about keyboard and mouse are now outdated as well.
I will take care of this. I will push into this pull request then.

[yeetari]

Nice work, code looks good, please could you squash the commits though.

[IAmNotHanni]

Other things: Can you rename the commits that they match our naming convention? See the Github Actions. Ignore the failed building for now, it is broken, will see when i get time for that.

This will only support one Gamepad right? not multiple?

Yeah we will require further rounds of revision.

[IAmNotHanni]

Nice work!

[IAmNotHanni]

I still need to update the docs on input, will do this tomorrow.

I fixed this.