feat(compiler-dom/runtime-dom): stringify eligible static trees

packages/runtime-core/src/vnode.ts

@@ -39,6 +39,7 @@ export const Portal = (Symbol(__DEV__ ? 'Portal' : undefined) as any) as {
 }
 export const Text = Symbol(__DEV__ ? 'Text' : undefined)
 export const Comment = Symbol(__DEV__ ? 'Comment' : undefined)
+export const Static = Symbol(__DEV__ ? 'Static' : undefined)
 
 export type VNodeTypes =
   | string
@@ -46,6 +47,7 @@ export type VNodeTypes =
   | typeof Fragment
   | typeof Portal
   | typeof Text
+  | typeof Static
   | typeof Comment
   | typeof SuspenseImpl
 
@@ -328,6 +330,10 @@ export function createTextVNode(text: string = ' ', flag: number = 0): VNode {
   return createVNode(Text, null, text, flag)
 }
 
+export function createStaticVNode(content: string): VNode {
+  return createVNode(Static, null, content)
+}
+
 export function createCommentVNode(
   text: string = '',
   // when used as the v-else branch, the comment node must be created as a