add ghostty config and theme

configs/ghostty_g/themes/Adventure

@@ -0,0 +1,21 @@
+palette = 0=#040404
+palette = 1=#d84a33
+palette = 2=#5da602
+palette = 3=#eebb6e
+palette = 4=#417ab3
+palette = 5=#e5c499
+palette = 6=#bdcfe5
+palette = 7=#dbded8
+palette = 8=#685656
+palette = 9=#d76b42
+palette = 10=#99b52c
+palette = 11=#ffb670
+palette = 12=#97d7ef
+palette = 13=#aa7900
+palette = 14=#bdcfe5
+palette = 15=#e4d5c7
+background = 040404
+foreground = feffff
+cursor-color = feffff
+selection-background = 606060
+selection-foreground = ffffff