feat(theme,interfaces): Introduce a global theming system and unify menu/tab interfaces; migrate components to use themeDefaultStyles and update APIs accordingly

ts_web/elements/00group-input/dees-input-wysiwyg/dees-wysiwyg-block.ts

@@ -15,6 +15,7 @@ import { BlockRegistry, type IBlockEventHandlers } from './blocks/index.js';
 import './wysiwyg.blockregistration.js';
 import { WysiwygShortcuts } from './wysiwyg.shortcuts.js';
 import '../../dees-contextmenu/dees-contextmenu.js';
+import { themeDefaultStyles } from '../../00theme.js';
 
 declare global {
   interface HTMLElementTagNameMap {
@@ -82,8 +83,10 @@ export class DeesWysiwygBlock extends DeesElement {
   }
 
   public static styles = [
+    themeDefaultStyles,
     cssManager.defaultStyles,
     css`
+      /* TODO: Migrate hardcoded values to --dees-* CSS variables */
       :host {
         display: block;
       }