add ghostty config and theme

configs/ghostty_g/themes/arcoiris

@@ -0,0 +1,21 @@
+palette = 0=#333333
+palette = 1=#da2700
+palette = 2=#12c258
+palette = 3=#ffc656
+palette = 4=#518bfc
+palette = 5=#e37bd9
+palette = 6=#63fad5
+palette = 7=#bab2b2
+palette = 8=#777777
+palette = 9=#ffb9b9
+palette = 10=#e3f6aa
+palette = 11=#ffddaa
+palette = 12=#b3e8f3
+palette = 13=#cbbaf9
+palette = 14=#bcffc7
+palette = 15=#efefef
+background = 201f1e
+foreground = eee4d9
+cursor-color = 7a1c1c
+selection-background = 25524a
+selection-foreground = f3fffd