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-iban/dees-input-iban.ts

@@ -11,6 +11,7 @@ import * as domtools from '@design.estate/dees-domtools';
 import { DeesInputBase } from '../dees-input-base/dees-input-base.js';
 import * as ibantools from 'ibantools';
 import { demoFunc } from './dees-input-iban.demo.js';
+import { themeDefaultStyles } from '../../00theme.js';
 
 @customElement('dees-input-iban')
 export class DeesInputIban extends DeesInputBase<DeesInputIban> {
@@ -30,9 +31,11 @@ export class DeesInputIban extends DeesInputBase<DeesInputIban> {
   accessor value = '';
 
   public static styles = [
+    themeDefaultStyles,
     ...DeesInputBase.baseStyles,
     cssManager.defaultStyles,
     css`
+      /* TODO: Migrate hardcoded values to --dees-* CSS variables */
       /* IBAN input specific styles can go here */
     `,
   ];