Update packageToolbox.m

[ehennestad]

• The packageToolbox function now accepts additional optional arguments using varargin, allowing for greater customization when calling the function.
• Added a check to ensure that the +matbox/installRequirements file exists; if not, the installMatBox() function is called to install necessary dependencies before packaging.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 41.92%. Comparing base (2519f3d) to head (9cf408b).
⚠️ Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #55      +/-   ##
==========================================
- Coverage   42.02%   41.92%   -0.11%     
==========================================
  Files          59       60       +1     
  Lines        1468     1493      +25     
==========================================
+ Hits          617      626       +9     
- Misses        851      867      +16     

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