add ghostty config and theme

configs/ghostty_g/themes/MaterialDarker

@@ -0,0 +1,21 @@
+palette = 0=#000000
+palette = 1=#ff5370
+palette = 2=#c3e88d
+palette = 3=#ffcb6b
+palette = 4=#82aaff
+palette = 5=#c792ea
+palette = 6=#89ddff
+palette = 7=#ffffff
+palette = 8=#545454
+palette = 9=#ff5370
+palette = 10=#c3e88d
+palette = 11=#ffcb6b
+palette = 12=#82aaff
+palette = 13=#c792ea
+palette = 14=#89ddff
+palette = 15=#ffffff
+background = 212121
+foreground = eeffff
+cursor-color = ffffff
+selection-background = eeffff
+selection-foreground = 545454