feat(linux): add ydotool support for paste on Wayland

[srix]

Summary

• Adds system.useYdotool setting for Linux Wayland users where enigo cannot simulate keystrokes into other windows
• When enabled, uses ydotool key ctrl+v to simulate paste instead of enigo, enabling paste in native Wayland apps (Konsole, VS Code, Cursor, KWrite, etc.)
• Falls back to enigo when the setting is disabled or ydotool is unavailable
• Also updates tauri-plugin-http to 2.5.7 and adds app data paths to the asset protocol scope for WAV file playback on Linux

Configuration

The system.useYdotool setting defaults to false. Linux Wayland users who need this should:

1. Install ydotool: sudo apt install ydotool
2. Set system.useYdotool to true in their settings (whispering-settings in localStorage)

No UI toggle has been added yet. When the setting is false (default), the original enigo behavior is unchanged on all platforms.

Context

On Linux with Wayland (especially KDE Plasma), enigo cannot inject keyboard events into other windows due to Wayland's security model. wtype also doesn't work on KDE as it lacks wlr-virtual-keyboard protocol support. ydotool works at the kernel level via /dev/uinput, making it compatible with all compositors and apps.

Test plan

• Verify paste works on Linux Wayland (KDE) with setting enabled and ydotool installed
• Verify paste still works on macOS and Windows (no behavior change, setting defaults to false)
• Verify paste works on Linux X11 with setting disabled (enigo, default behavior)
• Verify simulate_enter_keystroke works with ydotool enabled