feat(cli): build lib packed entry files

packages/vant-cli/src/compiler/vant-cli-site-plugin.ts

@@ -1,10 +1,12 @@
 import { Compiler } from 'webpack';
+import { replaceExt } from '../common';
+import { CSS_LANG } from '../common/css';
 import { genPackageEntry } from './gen-package-entry';
 import { genPacakgeStyle } from './gen-package-style';
 import { genSiteMobileShared } from './gen-site-mobile-shared';
 import { genSiteDesktopShared } from './gen-site-desktop-shared';
 import { genStyleDepsMap } from './gen-style-deps-map';
-import { PACKAGE_ENTRY_FILE } from '../common/constant';
+import { PACKAGE_ENTRY_FILE, PACKAGE_STYLE_FILE } from '../common/constant';
 
 const PLUGIN_NAME = 'VantCliSitePlugin';
 
@@ -20,7 +22,9 @@ export class VantCliSitePlugin {
           genPackageEntry({
             outputPath: PACKAGE_ENTRY_FILE
           });
-          genPacakgeStyle();
+          genPacakgeStyle({
+            outputPath: replaceExt(PACKAGE_STYLE_FILE, `.${CSS_LANG}`)
+          });
           genSiteMobileShared();
           genSiteDesktopShared();
           resolve();