add ghostty config and theme

configs/ghostty_g/themes/Batman

@@ -0,0 +1,21 @@
+palette = 0=#1b1d1e
+palette = 1=#e6dc44
+palette = 2=#c8be46
+palette = 3=#f4fd22
+palette = 4=#737174
+palette = 5=#747271
+palette = 6=#62605f
+palette = 7=#c6c5bf
+palette = 8=#505354
+palette = 9=#fff78e
+palette = 10=#fff27d
+palette = 11=#feed6c
+palette = 12=#919495
+palette = 13=#9a9a9d
+palette = 14=#a3a3a6
+palette = 15=#dadbd6
+background = 1b1d1e
+foreground = 6f6f6f
+cursor-color = fcef0c
+selection-background = 4d504c
+selection-foreground = f0e04a