add ghostty config and theme

configs/ghostty_g/themes/Atom

@@ -0,0 +1,21 @@
+palette = 0=#000000
+palette = 1=#fd5ff1
+palette = 2=#87c38a
+palette = 3=#ffd7b1
+palette = 4=#85befd
+palette = 5=#b9b6fc
+palette = 6=#85befd
+palette = 7=#e0e0e0
+palette = 8=#000000
+palette = 9=#fd5ff1
+palette = 10=#94fa36
+palette = 11=#f5ffa8
+palette = 12=#96cbfe
+palette = 13=#b9b6fc
+palette = 14=#85befd
+palette = 15=#e0e0e0
+background = 161719
+foreground = c5c8c6
+cursor-color = d0d0d0
+selection-background = 444444
+selection-foreground = c5c8c6