add ghostty config and theme

configs/ghostty_g/themes/SeaShells

@@ -0,0 +1,21 @@
+palette = 0=#17384c
+palette = 1=#d15123
+palette = 2=#027c9b
+palette = 3=#fca02f
+palette = 4=#1e4950
+palette = 5=#68d4f1
+palette = 6=#50a3b5
+palette = 7=#deb88d
+palette = 8=#434b53
+palette = 9=#d48678
+palette = 10=#628d98
+palette = 11=#fdd39f
+palette = 12=#1bbcdd
+palette = 13=#bbe3ee
+palette = 14=#87acb4
+palette = 15=#fee4ce
+background = 09141b
+foreground = deb88d
+cursor-color = fca02f
+selection-background = 1e4962
+selection-foreground = fee4ce