add ghostty config and theme

configs/ghostty_g/themes/MaterialDark

@@ -0,0 +1,21 @@
+palette = 0=#212121
+palette = 1=#b7141f
+palette = 2=#457b24
+palette = 3=#f6981e
+palette = 4=#134eb2
+palette = 5=#560088
+palette = 6=#0e717c
+palette = 7=#efefef
+palette = 8=#424242
+palette = 9=#e83b3f
+palette = 10=#7aba3a
+palette = 11=#ffea2e
+palette = 12=#54a4f3
+palette = 13=#aa4dbc
+palette = 14=#26bbd1
+palette = 15=#d9d9d9
+background = 232322
+foreground = e5e5e5
+cursor-color = 16afca
+selection-background = dfdfdf
+selection-foreground = 3d3d3d