add ghostty config and theme

configs/ghostty_g/themes/Chalk

@@ -0,0 +1,21 @@
+palette = 0=#7d8b8f
+palette = 1=#b23a52
+palette = 2=#789b6a
+palette = 3=#b9ac4a
+palette = 4=#2a7fac
+palette = 5=#bd4f5a
+palette = 6=#44a799
+palette = 7=#d2d8d9
+palette = 8=#888888
+palette = 9=#f24840
+palette = 10=#80c470
+palette = 11=#ffeb62
+palette = 12=#4196ff
+palette = 13=#fc5275
+palette = 14=#53cdbd
+palette = 15=#d2d8d9
+background = 2b2d2e
+foreground = d2d8d9
+cursor-color = 708284
+selection-background = e4e8ed
+selection-foreground = 3f4041