add ghostty config and theme

configs/ghostty_g/themes/matrix

@@ -0,0 +1,21 @@
+palette = 0=#0f191c
+palette = 1=#23755a
+palette = 2=#82d967
+palette = 3=#ffd700
+palette = 4=#3f5242
+palette = 5=#409931
+palette = 6=#50b45a
+palette = 7=#507350
+palette = 8=#688060
+palette = 9=#2fc079
+palette = 10=#90d762
+palette = 11=#faff00
+palette = 12=#4f7e7e
+palette = 13=#11ff25
+palette = 14=#c1ff8a
+palette = 15=#678c61
+background = 0f191c
+foreground = 426644
+cursor-color = 384545
+selection-background = 18282e
+selection-foreground = 00ff87