refactor(compiler): prefix all imported helpers to avoid scope collision

packages/compiler-core/src/options.ts

@@ -73,6 +73,9 @@ export interface CodegenOptions {
   scopeId?: string | null
   // we need to know about this to generate proper preambles
   prefixIdentifiers?: boolean
+  // option to optimize helper import bindings via variable assignment
+  // (only used for webpack code-split)
+  optimizeBindings?: boolean
   // for specifying where to import helpers
   runtimeModuleName?: string
   runtimeGlobalName?: string