chore: update package version and enhance build scripts

This commit updates the package version to 2026.7.19 and modifies
the build scripts to include additional commands for better
development workflow. The main window of the application is also set
to maximize upon launch.

- Updated package version in PKGBUILD
- Added new build commands in settings.local.json
- Maximized the main application window on startup

src-tauri/src/main.rs

@@ -33,6 +33,7 @@ fn close_splashscreen(app: tauri::AppHandle) -> Result<(), String> {
     }
 
     if let Some(window) = app.get_webview_window("main") {
+        let _ = window.maximize();
         window
             .show()
             .map_err(|error| format!("failed to show main window: {error}"))?;