RoBB 3D - June 2025 release

Changes:

• Godot 4.4 update and retest.
• On Web version, fixed explosion flipbook particle effect logging WebGL errors on web console. 
• Water shader tweak (color, and wave noise pattern).
• Reuse materials on fighter, bomber, destroyer, and missile (reduces draw calls) .
• Added Butler CI.
• Added an experimental MAC build.  Please let me know if you see lighting issues as the only Mac I have to test is a very old 2014 Mac Mini, which shows some directional light issues.
• Updated the intro to show all models so it forces materials to get compiled.