docs: add project logo to README and include image asset

README.md

@@ -1,5 +1,9 @@
 # VoiceMemo
 
+<p align="center">
+  <img src="logo.png" width="200" />
+</p>
+
 A professional, high-fidelity audio recording utility for macOS, designed to capture real-time voice conversations from any application using the native **ScreenCaptureKit** and **AVFoundation** frameworks.
 
 Read this in Chinese: [README_CN.md](README_CN.md)

README_CN.md

@@ -1,5 +1,9 @@
 # VoiceMemo
 
+<p align="center">
+  <img src="logo.png" width="200" />
+</p>
+
 一款专业、高保真的 macOS 音频录制工具，用于捕获任何应用程序的实时语音通话。基于 macOS 原生的 **ScreenCaptureKit** 和 **AVFoundation** 框架构建。
 
 English version: [README.md](README.md)