fix: support duplicated group on same component (opentiny#1324)

Author: chilingling

packages/plugins/materials/src/composable/useMaterial.ts

@@ -285,7 +285,9 @@ const addComponentSnippets = (componentSnippets: Snippet[] | undefined, snippets
     if (snippetsMap.has(snippetGroup.group)) {
       snippetsMap.get(snippetGroup.group)!.children.push(...snippetGroup.children)
     } else {
-      snippetsData.push(deepClone(snippetGroup))
+      const snippetGroupClone = deepClone(snippetGroup)
+      snippetsData.push(snippetGroupClone)
+      snippetsMap.set(snippetGroup.group, snippetGroupClone)
     }
   })