🎨 Add Alpha Color support to DrawFilledRectangle

[ghost]

So I made a discovery that If you use DrawPoint for DrawFilledRectangle, it enables you to use a System.Drawing.Color with an alpha value less than 255. Thought I might share it.

[9xbt]

For the love of god, make DrawLine support colors with the alpha channel instead of using DrawPoint

[MishaProductions]

These changes will probably make the function significantly slower.

[TheVogels]

These changes will probably make the function significantly slower.

I think it should mix colors if alpha != byte.MaxValue and don't draw if alpha == byte.MinValue.

[ghost]

For the love of god, make DrawLine support colors with the alpha channel instead of using DrawPoint

working on it

[ghost]

this may sound dumb but i give up lol
cosmos just won't give me any more FPS