Feature/speed source selection

[Anandb71]

Context of Contribution

• Bug Fix
• Refactoring
• New Feature
• Others

Summary of the Proposal

Add user setting to choose what metric (CPU, GPU, or Memory) determines the cat's running speed. Adds a "Speed based on" submenu in Settings with radio-style selection. GPU option is hidden if GPU monitoring is unavailable.

Reason for the new feature

• Requested by maintainer: allow users to configure which metric affects speed
• Some users prefer GPU load to drive animation (gamers, GPU-intensive work)
• Some users prefer Memory usage (developers with many apps open)
• Default remains CPU for backward compatibility
• GPU option automatically hidden if Performance Counters unavailable
• Minimal UI: simple radio submenu in existing Settings menu

Checklist

• This PR does not contain commits of multiple contexts.
• Code follows proper indentation and naming conventions.
• Implemented using only APIs that can be submitted to the Microsoft Store.
• Works correctly in both dark theme and light theme.
• Works correctly on any device.

[Kyome22]

This PR depends on #272, so I'll keep it as a draft for now.

[Kyome22]

@Anandb71 Could you please attach some screenshots?

[Anandb71]

[Anandb71]

Hey @Kyome22 , Even though I set 'speed based on' to GPU/Memory, the hover still shows CPU %. Should I change it?

[Kyome22]

Hey @Kyome22 , Even though I set 'speed based on' to GPU/Memory, the hover still shows CPU %. Should I change it?

Good catch! If the speed is based on the GPU/Memory, the hover message should be synced with it as well.

[Anandb71]

done! @Kyome22

[Anandb71]

Done! and tested!

[Kyome22]

There are several things I'd like to fix, but functionally it looks good, so LGTM.

[Kyome22]

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