add ghostty config and theme

configs/ghostty_g/themes/Grass

@@ -0,0 +1,21 @@
+palette = 0=#000000
+palette = 1=#bb0000
+palette = 2=#00bb00
+palette = 3=#e7b000
+palette = 4=#0000a3
+palette = 5=#950062
+palette = 6=#00bbbb
+palette = 7=#bbbbbb
+palette = 8=#555555
+palette = 9=#bb0000
+palette = 10=#00bb00
+palette = 11=#e7b000
+palette = 12=#0000bb
+palette = 13=#ff55ff
+palette = 14=#55ffff
+palette = 15=#ffffff
+background = 13773d
+foreground = fff0a5
+cursor-color = 8c2800
+selection-background = b64926
+selection-foreground = ffffff