Add websocket feature

[parsilver]

No description provided.

[codecov]

Codecov Report

Attention: 33 lines in your changes are missing coverage. Please review.

Comparison is base (fcf8149) 84.78% compared to head (e3701e0) 85.10%.
Report is 1 commits behind head on main.

Files	Patch %	Lines
src/WebSocket/Engine.php	5.88%	32 Missing ⚠️
src/WebSocket/Endpoints/MarketEndpoint.php	93.33%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main       #3      +/-   ##
============================================
+ Coverage     84.78%   85.10%   +0.31%     
- Complexity       92      138      +46     
============================================
  Files            15       21       +6     
  Lines           322      443     +121     
============================================
+ Hits            273      377     +104     
- Misses           49       66      +17     

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