chore(themes): add new themes api v2, add in-app theme editor/creator, macos compatibility, fix asset loading, rework settings and setup wizard

src-tauri/src/state.rs

@@ -6,4 +6,6 @@ use std::sync::Mutex;
 pub struct AppState {
     pub config: Mutex<Config>,
     pub opened_files: Mutex<Vec<PathBuf>>,
+    /// Theme folder requested by the main window when it opens the editor.
+    pub editor_theme_folder: Mutex<Option<String>>,
 }