feat(cli): add jest init file

packages/vant-cli/src/commands/jest.ts

@@ -1,10 +1,15 @@
 import { runCLI } from 'jest';
 import { setNodeEnv } from '../common';
-import { CWD, JEST_CONFIG_FILE } from '../common/constant';
+import { genPackageEntry } from '../compiler/gen-package-entry';
+import { CWD, JEST_CONFIG_FILE, PACKAGE_ENTRY_FILE } from '../common/constant';
 
 export function test(command: any) {
   setNodeEnv('test');
 
+  genPackageEntry({
+    outputPath: PACKAGE_ENTRY_FILE
+  });
+
   const config = {
     rootDir: CWD,
     watch: command.watch,