Add constraints on number of args

[kislaykishore]

Description

Limit the number of arguments that the root command can receive to the range [1, 2]

Link to the issue in case of a bug fix.

NA

Testing details

1. Manual - NA
2. Unit tests - Added unit tests.
3. Integration tests - NA

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 71.98%. Comparing base (e247b84) to head (2a5967a).
Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2066   +/-   ##
=======================================
  Coverage   71.98%   71.98%           
=======================================
  Files          99       99           
  Lines       10869    10870    +1     
=======================================
+ Hits         7824     7825    +1     
  Misses       2713     2713           
  Partials      332      332           

Flag	Coverage Δ
unittests	71.98% <100.00%> (+<0.01%)	⬆️

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