add ghostty config and theme

configs/ghostty_g/themes/GruvboxLight

@@ -0,0 +1,21 @@
+palette = 0=#fbf1c7
+palette = 1=#9d0006
+palette = 2=#79740e
+palette = 3=#b57614
+palette = 4=#076678
+palette = 5=#8f3f71
+palette = 6=#427b58
+palette = 7=#3c3836
+palette = 8=#9d8374
+palette = 9=#cc241d
+palette = 10=#98971a
+palette = 11=#d79921
+palette = 12=#458588
+palette = 13=#b16186
+palette = 14=#689d69
+palette = 15=#7c6f64
+background = fbf1c7
+foreground = 282828
+cursor-color = 282828
+selection-background = d5c4a1
+selection-foreground = 665c54