add ghostty config and theme

configs/ghostty_g/themes/Firewatch

@@ -0,0 +1,21 @@
+palette = 0=#585f6d
+palette = 1=#d95360
+palette = 2=#5ab977
+palette = 3=#dfb563
+palette = 4=#4d89c4
+palette = 5=#d55119
+palette = 6=#44a8b6
+palette = 7=#e6e5ff
+palette = 8=#585f6d
+palette = 9=#d95360
+palette = 10=#5ab977
+palette = 11=#dfb563
+palette = 12=#4c89c5
+palette = 13=#d55119
+palette = 14=#44a8b6
+palette = 15=#e6e5ff
+background = 1e2027
+foreground = 9ba2b2
+cursor-color = f6f7ec
+selection-background = 2f363e
+selection-foreground = 7d8fa4