Complete carousel refactor.

Reduces one layer of DOM nesting for simplication, uses the latest Embla
version, unittests for everything.

src/action-handler-directive.ts

@@ -6,9 +6,9 @@ import type {
 import { noChange } from 'lit';
 import {
   AttributePart,
-  directive,
   Directive,
   DirectiveParameters,
+  directive,
 } from 'lit/directive.js';
 import { stopEventFromActivatingCardWideActions } from './utils/action.js';
 import { Timer } from './utils/timer.js';