add ghostty config and theme

configs/ghostty_g/themes/darkmatrix

@@ -0,0 +1,21 @@
+palette = 0=#091013
+palette = 1=#006536
+palette = 2=#6fa64c
+palette = 3=#7e8000
+palette = 4=#2c9a84
+palette = 5=#452d53
+palette = 6=#114d53
+palette = 7=#006536
+palette = 8=#333333
+palette = 9=#00733d
+palette = 10=#90d762
+palette = 11=#e2e500
+palette = 12=#46d8b8
+palette = 13=#4a3059
+palette = 14=#12545a
+palette = 15=#006536
+background = 070c0e
+foreground = 3e5715
+cursor-color = 9fa86e
+selection-background = 0f191c
+selection-foreground = 00ff87