message: feat(theme): add customElements for feed2
diff: @@ -30,6 +30,15 @@ export const resolveFeedPlugin = (
  { author, channel: { copyright } },
  ]
  ),
  + customElements: [
  + "ExternalLinkIcon",
  + "Badge",
  + "CodeGroup",
  + "CodeGroupItem",
  + "CodeDemo",
  + "Mermaid",
  + "Presentation",
  + ],
  },
  options || {}
  )
  