Workerman-vmstats using Server Send Events version

https://github.com/joanhey/workerman-vmstat

Using SSE, as we only send data from the server to the browser.

Removed `jquery`, `sugar.js` and `chroma.js`.
Also `reconnecting-websocket.js` as SSE auto-reconnect.

@walkor check the code (thanks)

Start by reviewing the repository linked in the issue and the current browser/server implementation. Verify how the existing jquery, sugar.js, chroma.js, and reconnecting-websocket.js dependencies are used, then determine whether the intended result is SSE-based server-to-browser updates with automatic reconnection and no longer needs those dependencies.

Written by the indexing model from the issue text.