feat: allow using AngularSlickgrid component w/o grid options

[ghiscoding]

• we should be able to use Angular-Slickgrid component without providing any grid options

[bolt-new-by-stackblitz]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (9c91f8d) to head (396582b).
Report is 5 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##            master     #1505   +/-   ##
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  Coverage   100.00%   100.00%           
=========================================
  Files            7         7           
  Lines          950       952    +2     
  Branches       321       321           
=========================================
+ Hits           950       952    +2     

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