Raid Frame Tweaks

Minor enhancements to the stock raid frame including textures and target marker icons.

Target Markers
Shows raid target markers like skull or diamond on the stock UI raid frame. You can customize size of the markers and position them on raid frame cells centered or on any side or any corner. Extremely helpful for raid leaders for many purposes, for healers to locate a tank marked STAR on the raid frame, and for melee players on C'THUN.

Raid Frame Texture
Hate the new 1.15.9 flat look? Select a new texture to get back that OG Vanilla stock raid frame look. The current default is FLAT which has no depth at all. New options include SOFTER for the OG look, as well as ALUMINIUM, BLIZZARD, and SMOOTH for more even more crisp options.