Little Performance Improvements

Improve hammer previews and separate tool preview settings

• Fast hammer outlines.
• Rename shapeRenderer/shapeColor to chiselRenderer/chiselColor, preserving saved settings.
• Add hammerColor.
• Use the editing outline path for the chisel Replace, Stencil, and Colorize mode too.
• Make covered editing outlines dashed at 25% opacity; visible lines stay solid.

Fix preview z-fighting on coincident surfaces

• Give Default, Surface, and Texture previews depth priority, including at steep viewing angles.

Fix translucent tiles rendering in front of previews

• Adjust editing-preview rendering order and depth handling.

Fix blueprint rotation point rendering

• Preserve marker colors independently of blueprintColor, including internal faces with “even” enabled.
• Exclude markers from Texture and Outline geometry and occlusion.
• Keep Surface markers steady and respect previewSurfaceAlpha.
• Handle marker visibility within Surface’s depth pass, including cached frames.