Add Netease Music auto-pause support with direct AXPress menu control

[Zhivago-Sizov]

Closes #184

Summary

• add auto-pause support for Netease Music
• control Netease Music playback through its Controls menu using macOS accessibility APIs
• use direct AXPress on the target menu item first, with the existing System Events menu-click path kept as a fallback
• document the fallback behavior and local testing workflow

Context

Issue #184 requested support for Netease Cloud Music.

This change adds Netease Music to the supported auto-pause players list. The implementation inspects the app's Controls menu and toggles playback through accessibility menu items. To avoid briefly revealing the menu during auto-pause, it first tries to invoke the target AXMenuItem directly with AXPress. If direct accessibility control fails, it falls back to the previous UI scripting approach.

Verification

• xcodebuild -project BGMApp/BGMApp.xcodeproj -scheme 'Background Music' -configuration Debug -quiet build
• manually verified Netease Music playback state can be toggled through direct accessibility menu item actions
• verified the fallback path remains available if direct accessibility control cannot be used

Notes

• I intentionally did not add a copyright notice to the modified files. Happy to add one if you want it included.