docs: added shader naming convention to README
docs: added shader naming convention to README

ScottLogic/d3fc,d3fc/d3fc,jleft/d3-financial-components,jleft/d3-financial-components,jleft/d3-financial-components,ScottLogic/d3fc,d3fc/d3fc,ScottLogic/d3fc,ColinEberhardt/d3fc,ColinEberhardt/d3fc,ColinEberhardt/d3fc,d3fc/d3fc,d3fc/d3fc