ZeroHello: Speed test

- [ ] Use PeerMessage and BackgroundProccessing plugins

Test connection:
- [ ] Internet
- [ ] Local network

The issue names the PeerMessage and BackgroundProccessing plugins and asks for Internet and local-network connection tests. Start by locating those plugins and any existing connection or speed-test entry points; done is a working speed test covering both connection types.

由索引模型根据 Issue 内容生成。