add ghostty config and theme

configs/ghostty_g/themes/Dark Modern

@@ -0,0 +1,21 @@
+palette = 0=#272727
+palette = 1=#f74949
+palette = 2=#2ea043
+palette = 3=#9e6a03
+palette = 4=#0078d4
+palette = 5=#d01273
+palette = 6=#1db4d6
+palette = 7=#cccccc
+palette = 8=#5d5d5d
+palette = 9=#dc5452
+palette = 10=#23d18b
+palette = 11=#f5f543
+palette = 12=#3b8eea
+palette = 13=#d670d6
+palette = 14=#29b8db
+palette = 15=#e5e5e5
+background = 1f1f1f
+foreground = cccccc
+cursor-color = ffffff
+selection-background = 3a3d41
+selection-foreground = e0e0e0