add ghostty config and theme

configs/ghostty_g/themes/Horizon

@@ -0,0 +1,21 @@
+palette = 0=#131519
+palette = 1=#e95478
+palette = 2=#14d386
+palette = 3=#fab795
+palette = 4=#30aad7
+palette = 5=#b877db
+palette = 6=#1fdad9
+palette = 7=#c7c7c7
+palette = 8=#686868
+palette = 9=#e06783
+palette = 10=#0af29d
+palette = 11=#fac39a
+palette = 12=#56c2ea
+palette = 13=#c38ce1
+palette = 14=#3ce8e6
+palette = 15=#ffffff
+background = 1c1e26
+foreground = bbbaba
+cursor-color = c7c7c7
+selection-background = 292b36
+selection-foreground = dfd3d5