add ghostty config and theme

configs/ghostty_g/themes/PencilDark

@@ -0,0 +1,21 @@
+palette = 0=#212121
+palette = 1=#c30771
+palette = 2=#10a778
+palette = 3=#a89c14
+palette = 4=#008ec4
+palette = 5=#523c79
+palette = 6=#20a5ba
+palette = 7=#d9d9d9
+palette = 8=#424242
+palette = 9=#fb007a
+palette = 10=#5fd7af
+palette = 11=#f3e430
+palette = 12=#20bbfc
+palette = 13=#6855de
+palette = 14=#4fb8cc
+palette = 15=#f1f1f1
+background = 212121
+foreground = f1f1f1
+cursor-color = 20bbfc
+selection-background = b6d6fd
+selection-foreground = f1f1f1