add ghostty config and theme

configs/ghostty_g/themes/Twilight

@@ -0,0 +1,21 @@
+palette = 0=#141414
+palette = 1=#c06d44
+palette = 2=#afb97a
+palette = 3=#c2a86c
+palette = 4=#44474a
+palette = 5=#b4be7c
+palette = 6=#778385
+palette = 7=#ffffd4
+palette = 8=#262626
+palette = 9=#de7c4c
+palette = 10=#ccd88c
+palette = 11=#e2c47e
+palette = 12=#5a5e62
+palette = 13=#d0dc8e
+palette = 14=#8a989b
+palette = 15=#ffffd4
+background = 141414
+foreground = ffffd4
+cursor-color = ffffff
+selection-background = 313131
+selection-foreground = ffffd4