feat(args): --new arg to bypass persistent conversations

[hayemaxi]

Also deletes the past conversation history.

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[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 16.75%. Comparing base (84c4015) to head (4088411).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1813   +/-   ##
=======================================
  Coverage   16.75%   16.75%           
=======================================
  Files         213      213           
  Lines       20704    20704           
  Branches      871      871           
=======================================
  Hits         3468     3468           
  Misses      17236    17236           

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