Websocket fix

[tieneupin]

Previously, the websocket connection would be prone to breaking, preventing logs from the client from being displayed in the loggers set up on the server side. This problem got even more pronounced as the Murfey ecosystem became more complicated, especially with the addition of a React app frontend and having NGINX manage incoming connections.

This PR seems to have resolved this issue (confirmed after multiple runs of the data transfer workflow with both the instrument server and TUI modes of transfer happening simultaneously) by encasing the WebSocketApp.send() and WebSocketApp.close() commands in a try-except block. Additionally, the ping_interval parameter was added to the WebSocketApp.run_forever() function to prevent the connection from closing when the client is idling.

Also tidies up and adds comments to describe the code in murfey.client.__init__.

[codecov]

Codecov Report

Attention: Patch coverage is 26.92308% with 19 lines in your changes missing coverage. Please review.

Project coverage is 30.18%. Comparing base (59297f9) to head (d1640c0).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #592      +/-   ##
==========================================
- Coverage   30.19%   30.18%   -0.02%     
==========================================
  Files          80       80              
  Lines       10567    10574       +7     
  Branches     1410     1410              
==========================================
+ Hits         3191     3192       +1     
- Misses       7270     7276       +6     
  Partials      106      106              

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