Add support for setting a joypad's LED light color

[Nintorch]

Based on #111707 (it can be closed if this PR can be merged)

I decided to split my big SDL3 joypad features PR ( #107967 ) into several smaller PRs, this PR is one of them.

This PR adds the ability to set the color/brightness of a joypad's LED light color, if it has one. An example of a controller with an LED light is DualShock 4.

This PR hasn't been tested yet 😅 but it should work correctly since I copied the code from my earlier PR that had this feature working correctly. After the CI passes, I will test it and create a small test project. (Not sure it's required, this PR is a pretty simple one, it only adds 2 more methods on top of the motion sensors PR)

TODO:

• fix encapsulation, see: Add support for joypad motion sensors #111679 (comment)

[Meorge]

Tested on macOS with both a DualSense (PS5) and DualShock (PS4) controller, wired and wireless, and works great in all cases! 😄

For convenience for anyone else testing this, here's a very minimal project that displays a color picker when a supported controller is connected:
test-joypad-led.zip

[bruvzg]

Tested on macOS and Windows with DualSense controller, working as expected.

[Nintorch]

Thank you for your reviews, bruvzg and AThousandShips!
I've modified the code to include AThousandShips' corrections!

[Nintorch]

Now that I think about it, should we provide an Input.get_joy_light() method but with a note that says this method only returns the color set by the game itself and not the other applications? Input.get_joy_vibration_strength() and duration basically work like that too
We can also remove the JoypadFeatures class in this case too, but then we won't be able to tell if the operation was successful. It that's important, we can leave it as is

[AThousandShips]

I'd say to leave it without a method to get it to reduce clutter and confusion, assuming the color is expected to change downstream and the return value is expected to not be reliable

[Nintorch]

Thank you for your review, Mickeon! I included your suggested changes into the code!

[Nintorch]

May I ask if there are other reviewers that need to review this PR before it can be merged?

[Repiteo]

Thanks!

[Nintorch]

You're welcome! And thank you too! :)