A Fistful of Shaders

[StartAutomating]

Now that we can build shader functions (#163), it's time to expand out the list of shaders we have to offer.

obs-powershell should include several custom shaders.

These should be generated after shaders from obs-shaderfilter

• Reflect shader should reflect Horizontally and Vertically #197
• RGBA-Percent shader should allow Percentage RGBA Adjustments #198
• Zoom_XY shader should zoom horizontally and vertically #199
• Flip Shader should flip an image (horizontally or vertically) #200