Add CLI Flag for --forced-separate

[hirak99]

Implements #2366

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.19%. Comparing base (9f1be49) to head (5a9ad09).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2367   +/-   ##
=======================================
  Coverage   99.19%   99.19%           
=======================================
  Files          39       39           
  Lines        3090     3091    +1     
  Branches      680      680           
=======================================
+ Hits         3065     3066    +1     
  Misses         14       14           
  Partials       11       11           

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