feat(workflow): add group node support and translations

- Introduced GroupDefault node with metadata and default values for group nodes.
- Enhanced useNodeMetaData hook to handle group node author and description using translations.
- Added translations for group node functionality in English, Japanese, Simplified Chinese, and Traditional Chinese.

web/app/components/workflow/nodes/group/default.ts

@@ -0,0 +1,26 @@
+import type { NodeDefault } from '../../types'
+import type { GroupNodeData } from './types'
+import { BlockEnum } from '@/app/components/workflow/types'
+import { genNodeMetaData } from '@/app/components/workflow/utils'
+
+const metaData = genNodeMetaData({
+  sort: 100,
+  type: BlockEnum.Group,
+})
+
+const nodeDefault: NodeDefault<GroupNodeData> = {
+  metaData,
+  defaultValue: {
+    members: [],
+    handlers: [],
+    headNodeIds: [],
+    leafNodeIds: [],
+  },
+  checkValid() {
+    return {
+      isValid: true,
+    }
+  },
+}
+
+export default nodeDefault