add ghostty config and theme

configs/ghostty_g/themes/SpaceGray Eighties Dull

@@ -0,0 +1,21 @@
+palette = 0=#15171c
+palette = 1=#b24a56
+palette = 2=#92b477
+palette = 3=#c6735a
+palette = 4=#7c8fa5
+palette = 5=#a5789e
+palette = 6=#80cdcb
+palette = 7=#b3b8c3
+palette = 8=#555555
+palette = 9=#ec5f67
+palette = 10=#89e986
+palette = 11=#fec254
+palette = 12=#5486c0
+palette = 13=#bf83c1
+palette = 14=#58c2c1
+palette = 15=#ffffff
+background = 222222
+foreground = c9c6bc
+cursor-color = bbbbbb
+selection-background = 272e36
+selection-foreground = ffffff