Revert "swarm (#4520)" (#4521)

This reverts commit cc9c619396.

docs/.vitepress/theme/themes/configs/index.ts

@@ -13,11 +13,13 @@
  *  See the License for the specific language governing permissions and
  *  limitations under the License.
  */
+import { christmasTheme } from './christmas'
 import { catppuccinTheme } from './catppuccin'
 import type { ThemeRegistry } from '../types'
 
 export const themeRegistry: ThemeRegistry = {
   catppuccin: catppuccinTheme,
+  christmas: christmasTheme,
 }
 
-export { catppuccinTheme }
+export { christmasTheme, catppuccinTheme }