feat: add uwsm/hyprland launch wrapper and fix CLI args

- Add launch_wrapper config option with auto-detection for uwsm and
  hyprland sessions, ensuring apps launch with proper session management
- Fix CLI argument parsing by preventing GTK from intercepting
  clap-parsed args (--mode, --providers)
- Improve desktop file Exec field parsing to properly handle quoted
  arguments and FreeDesktop field codes (%u, %F, etc.)
- Add unit tests for Exec field parsing

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/app.rs

@@ -30,7 +30,9 @@ impl OwlryApp {
     }
 
     pub fn run(&self) -> i32 {
-        self.app.run().into()
+        // Use empty args since clap already parsed our CLI arguments.
+        // This prevents GTK from trying to parse --mode, --providers, etc.
+        self.app.run_with_args(&[] as &[&str]).into()
     }
 
     fn on_activate(app: &Application, args: &CliArgs) {