Complete carousel refactor.

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

tests/utils/zod.test.ts

@@ -1,9 +1,9 @@
 import { describe, expect, it } from 'vitest';
-import { z } from 'zod';
+import { z, ZodError } from 'zod';
 import {
-    deepRemoveDefaults,
-    getParseErrorKeys,
-    getParseErrorPaths,
+  deepRemoveDefaults,
+  getParseErrorKeys,
+  getParseErrorPaths,
 } from '../../src/utils/zod';
 
 describe('deepRemoveDefaults', () => {
@@ -88,4 +88,7 @@ describe('getParseErrorPaths', () => {
       new Set(['array[0] -> type', 'array[0] -> data']),
     );
   });
+  it('should get no paths for empty error', () => {
+    expect(getParseErrorPaths(new ZodError([]))).toEqual(new Set());
+  });
 });