Feature: add Filled polygon operator to the drawing operations

[SahanDisa]

Polygon is a figure with at least three straight sides and angles.OpenCV provides polygon drawing facility with Improc.fillPoly() method. Moreover, the operator enables to add custom points dynamically and it will generate the filled polygon accordingly.

[anikethariom]

hello sir @SahanDisa this feature will work on python or electron . I want to work on this repo . give some tips to how I get start to this .