@rnw/cli add package.json:codegenConfig.windows.outputDirectory (#11891)

* Add package.json:codegenConfig.windows.outputDirectory

* Change files

Author: ZihanChen-MSFT

change/@react-native-windows-cli-4c7dac7a-f8f1-4115-8416-0f071e245477.json

@@ -0,0 +1,7 @@
+{
+  "type": "prerelease",
+  "comment": "Add package.json:codegenConfig.windows.outputDirectory",
+  "packageName": "@react-native-windows/cli",
+  "email": "53799235+ZihanChen-MSFT@users.noreply.github.com",
+  "dependentChangeType": "patch"
+}

packages/@react-native-windows/cli/src/codegen.ts

@@ -123,6 +123,8 @@ export class CodeGenWindows {
     const jsRootDir = pkgJson.codegenConfig.jsSrcsDir
       ? path.join(this.root, pkgJson.codegenConfig.jsSrcsDir)
       : this.root;
+    const codegenOutputDir =
+      pkgJson.codegenConfig.windows.outputDirectory ?? 'codegen';
 
     const generators = pkgJson.codegenConfig.windows.generators ?? [
       'modulesWindows',
@@ -143,7 +145,7 @@ export class CodeGenWindows {
         generators.indexOf('modulesTypeScriptTypes') !== -1,
       modulesWindows: generators.indexOf('modulesWindows') !== -1,
       namespace: projectNamespace,
-      outputDirectory: path.join(this.root, 'codegen'),
+      outputDirectory: path.join(this.root, codegenOutputDir),
       test: !!this.options.check,
     };