add ghostty config and theme

configs/ghostty_g/themes/Neutron

@@ -0,0 +1,21 @@
+palette = 0=#23252b
+palette = 1=#b54036
+palette = 2=#5ab977
+palette = 3=#deb566
+palette = 4=#6a7c93
+palette = 5=#a4799d
+palette = 6=#3f94a8
+palette = 7=#e6e8ef
+palette = 8=#23252b
+palette = 9=#b54036
+palette = 10=#5ab977
+palette = 11=#deb566
+palette = 12=#6a7c93
+palette = 13=#a4799d
+palette = 14=#3f94a8
+palette = 15=#ebedf2
+background = 1c1e22
+foreground = e6e8ef
+cursor-color = f6f7ec
+selection-background = 2f363e
+selection-foreground = 7d8fa4