add ghostty config and theme

configs/ghostty_g/themes/Cobalt2

@@ -0,0 +1,21 @@
+palette = 0=#000000
+palette = 1=#ff0000
+palette = 2=#38de21
+palette = 3=#ffe50a
+palette = 4=#1460d2
+palette = 5=#ff005d
+palette = 6=#00bbbb
+palette = 7=#bbbbbb
+palette = 8=#555555
+palette = 9=#f40e17
+palette = 10=#3bd01d
+palette = 11=#edc809
+palette = 12=#5555ff
+palette = 13=#ff55ff
+palette = 14=#6ae3fa
+palette = 15=#ffffff
+background = 132738
+foreground = ffffff
+cursor-color = f0cc09
+selection-background = 18354f
+selection-foreground = b5b5b5