add link to MSW browser mode guide

Author: EskiMojo14

docs/usage/WritingTests.mdx

@@ -55,6 +55,7 @@ See these resources for typical test runner configuration instructions:
 - **Jest**:
   - [Jest: Getting Started](https://jestjs.io/docs/getting-started)
   - [Jest: Configuration - Test Environment](https://jestjs.io/docs/configuration#testenvironment-string)
+  - [MSW: Mock server configuration for Vitest Browser Mode](https://mswjs.io/docs/recipes/vitest-browser-mode/)
 
 ### UI and Network Testing Tools