feat: Parallel Execution of Nodes in Workflows (#8192)

Co-authored-by: StyleZhang <jasonapring2015@outlook.com>
Co-authored-by: Yi <yxiaoisme@gmail.com>
Co-authored-by: -LAN- <laipz8200@outlook.com>

web/app/components/workflow/nodes/iteration-start/default.ts

@@ -0,0 +1,21 @@
+import type { NodeDefault } from '../../types'
+import type { IterationStartNodeType } from './types'
+import { ALL_CHAT_AVAILABLE_BLOCKS, ALL_COMPLETION_AVAILABLE_BLOCKS } from '@/app/components/workflow/constants'
+
+const nodeDefault: NodeDefault<IterationStartNodeType> = {
+  defaultValue: {},
+  getAvailablePrevNodes() {
+    return []
+  },
+  getAvailableNextNodes(isChatMode: boolean) {
+    const nodes = isChatMode ? ALL_CHAT_AVAILABLE_BLOCKS : ALL_COMPLETION_AVAILABLE_BLOCKS
+    return nodes
+  },
+  checkValid() {
+    return {
+      isValid: true,
+    }
+  },
+}
+
+export default nodeDefault