add ghostty config and theme

configs/ghostty_g/themes/synthwave

@@ -0,0 +1,21 @@
+palette = 0=#000000
+palette = 1=#f6188f
+palette = 2=#1ebb2b
+palette = 3=#fdf834
+palette = 4=#2186ec
+palette = 5=#f85a21
+palette = 6=#12c3e2
+palette = 7=#ffffff
+palette = 8=#000000
+palette = 9=#f841a0
+palette = 10=#25c141
+palette = 11=#fdf454
+palette = 12=#2f9ded
+palette = 13=#f97137
+palette = 14=#19cde6
+palette = 15=#ffffff
+background = 000000
+foreground = dad9c7
+cursor-color = 19cde6
+selection-background = 19cde6
+selection-foreground = 000000