Introduce runtime-driven UI theming for the server browser
- Expose PushUITheme() in F4TServerBrowserBridge and implement ColorToJson + PushUIThemeInternal to serialize HUD colors and invoke a JS hook.
- Call PushUITheme on UI initialization and when the browser is shown so the webview receives current HUD colors.
- Add frontend handler for "uiTheme" in app.js and a new components/theme.js that implements window.applyCoTheme to set CSS vars and tint the cursor SVG.
- Update styles.css to use RGB component CSS variables (--co-r/--co-g/--co-b and background equivalents) so colors can be overridden at runtime.
- Update index.html to include the new theme script and tweak cursor SVG stroke width; cursor asset updated as well.
This enables the plugin to synchronize the in-game HUD colors with the browser UI dynamically.
Add F4MouseCursor.png and F4MouseCursor.svg assets and wire up a CSS variable (--co-cursor) to use the custom cursor in the browser. Update styles.css to apply the cursor variable to body and interactive elements. Modify deploy-all.bat to create %PRISMA_ROOT%\misc and copy the PNG to %PRISMA_ROOT%\misc\cursor.png at deploy time, with a warning if the file is missing. This enables a consistent custom cursor for the PrismaUI_F4 runtime (runtime reads misc\cursor.png) while still providing a browser CSS fallback.