add ghostty config and theme

configs/ghostty_g/themes/Alabaster

@@ -0,0 +1,21 @@
+palette = 0=#000000
+palette = 1=#aa3731
+palette = 2=#448c27
+palette = 3=#cb9000
+palette = 4=#325cc0
+palette = 5=#7a3e9d
+palette = 6=#0083b2
+palette = 7=#f7f7f7
+palette = 8=#777777
+palette = 9=#f05050
+palette = 10=#60cb00
+palette = 11=#ffbc5d
+palette = 12=#007acc
+palette = 13=#e64ce6
+palette = 14=#00aacb
+palette = 15=#f7f7f7
+background = f7f7f7
+foreground = 000000
+cursor-color = 007acc
+selection-background = bfdbfe
+selection-foreground = 000000