Add Wine control panel settings action

[weter11]

Motivation

• Provide a quick way to open Wine's Control Panel from the Settings window by launching Wine's control.exe using the configured Proton runner and SteamFlow's master Wine prefix.

Description

• Add launch_wine_control_panel(config: &LauncherConfig) -> Result<()> in src/launch/mod.rs which resolves the default Proton runner, ensures the master Wine prefix exists, sets WINEPREFIX / STEAM_COMPAT_DATA_PATH and other display env vars, and spawns control.exe through the runner.
• Add a WineControlPanelLaunched variant to the AsyncOp enum and handle it in the operation loop to update the UI status when the control panel is launched.
• Add a "Wine Tools" section to the Settings window in src/ui.rs with an "Open Wine Control Panel" button that spawns a task to call launch_wine_control_panel and sends success or error AsyncOp events.
• Minor formatting/cleanup around affected call sites and function signatures to integrate the new helper cleanly.

Testing

• Ran cargo check which completed successfully (build issued unrelated warnings from a vendored crate).

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Codex Task