feat(cli): add css.removeSourceFile config (#10750)

packages/vant-cli/src/compiler/compile-style.ts

@@ -1,11 +1,13 @@
 import { parse } from 'path';
-import { readFileSync, writeFileSync } from 'fs';
-import { replaceExt } from '../common/index.js';
+import fse from 'fs-extra';
+import { getVantConfig, replaceExt } from '../common/index.js';
 import { compileCss } from './compile-css.js';
 import { compileLess } from './compile-less.js';
 import { compileSass } from './compile-sass.js';
 import { consola } from '../common/logger.js';
 
+const { readFileSync, writeFileSync, removeSync } = fse;
+
 async function compileFile(filePath: string) {
   const parsedPath = parse(filePath);
 
@@ -30,6 +32,11 @@ async function compileFile(filePath: string) {
 
 export async function compileStyle(filePath: string) {
   const css = await compileFile(filePath);
+  const vantConfig = getVantConfig();
+
+  if (vantConfig.build?.css?.removeSourceFile) {
+    removeSync(filePath);
+  }
 
   writeFileSync(replaceExt(filePath, '.css'), css);
 }