fix: exclude node_modules but keep @slidev/client in windicss scan (#164)

Co-authored-by: Anthony Fu <anthonyfu117@hotmail.com>

Author: hannoeru

packages/slidev/node/plugins/windicss.ts

@@ -3,7 +3,7 @@ import WindiCSS, { defaultConfigureFiles } from 'vite-plugin-windicss'
 import { ResolvedSlidevOptions, SlidevPluginOptions } from '..'
 
 export function createWindiCSSPlugin(
-  { themeRoots, clientRoot }: ResolvedSlidevOptions,
+  { themeRoots, clientRoot, userRoot }: ResolvedSlidevOptions,
   { windicss: windiOptions }: SlidevPluginOptions,
 ) {
   return WindiCSS(
@@ -13,6 +13,9 @@ export function createWindiCSSPlugin(
         ...themeRoots.map(i => `${i}/windi.config.ts`),
         resolve(clientRoot, 'windi.config.ts'),
       ],
+      onOptionsResolved(config) {
+        config.scanOptions.include.push(`!${resolve(userRoot, 'node_modules')}`)
+      },
       ...windiOptions,
     },
     {