add ghostty config and theme

configs/ghostty_g/themes/Zenburn

@@ -0,0 +1,21 @@
+palette = 0=#4d4d4d
+palette = 1=#705050
+palette = 2=#60b48a
+palette = 3=#f0dfaf
+palette = 4=#506070
+palette = 5=#dc8cc3
+palette = 6=#8cd0d3
+palette = 7=#dcdccc
+palette = 8=#709080
+palette = 9=#dca3a3
+palette = 10=#c3bf9f
+palette = 11=#e0cf9f
+palette = 12=#94bff3
+palette = 13=#ec93d3
+palette = 14=#93e0e3
+palette = 15=#ffffff
+background = 3f3f3f
+foreground = dcdccc
+cursor-color = 73635a
+selection-background = 21322f
+selection-foreground = c2d87a