feat: export compileFile (#13)

Co-authored-by: Evan You <yyx990803@gmail.com>

Author: sxzz

src/index.ts

@@ -1,3 +1,4 @@
 export { default as Repl } from './Repl.vue'
 export { ReplStore, File } from './store'
+export { compileFile } from './transform'
 export type { Store, SFCOptions, StoreState } from './store'