refactor: renaming for clarity and consistency

[mccutchen]

The renames:

websocket.Conn    -> websocket.Websocket
websocket.NewConn -> websocket.New
Read              -> ReadMessage
Write             -> WriteMessage

[codecov]

Codecov Report

Attention: Patch coverage is 72.46377% with 19 lines in your changes missing coverage. Please review.

Project coverage is 79.57%. Comparing base (45fe11b) to head (bf9e2bf).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
websocket.go	66.66%	9 Missing and 9 partials ⚠️
hooks.go	93.33%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #15   +/-   ##
=======================================
  Coverage   79.57%   79.57%           
=======================================
  Files           2        3    +1     
  Lines         421      421           
=======================================
  Hits          335      335           
  Misses         62       62           
  Partials       24       24           

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