[Input] Improved gamepad key repeat to make navigation snappier

[veryprofessionaldodo]

Noticed gamepad input was repeating too sluggishly making navigating the library a bit cumbersome or spammy. Added in base activation delay to stick and pad inputs to make navigation feel snappier, while retaining precision. Videos show it better than words, before shows how it's currently being done, after shows me alternating between using pad and joystick navigation:

Before:

Gravacao.do.ecra.2025-12-02.as.16.07.40.mov

After:

Gravacao.do.ecra.2025-12-02.as.16.01.04.mov

Let me know if there's something you want me to change :)

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Use the following Checklist if you have changed something on the Backend or Frontend:

• Tested the feature and it's working on a current and clean install.
• Tested the main App features and they are still working on a current and clean install. (Login, Install, Play, Uninstall, Move games, etc.)
• Created / Updated Tests (If necessary)
• Created / Updated documentation (If necessary)

[CommandMC]

I wonder whether we want to make the repeat delay configurable (that doesn't need to be in this PR, just thinking out loud). Before, it definitely was too slow. With the changes here, it's a little too fast for my taste (but I assume for other people it'll be fine)

I don't entirely understand the gamepad input handling code, so I don't feel comfortable giving this an approval just yet. @arielj if you could spare some time?

[veryprofessionaldodo]

Interesting, you're right, I could have considered that as well! I can try to find out gamepad repeat defaults in other places like the PS5 to make it match things other people might be more used to