add ghostty config and theme

configs/ghostty_g/themes/Mariana

@@ -0,0 +1,21 @@
+palette = 0=#000000
+palette = 1=#ec5f66
+palette = 2=#99c794
+palette = 3=#f9ae58
+palette = 4=#6699cc
+palette = 5=#c695c6
+palette = 6=#5fb4b4
+palette = 7=#f7f7f7
+palette = 8=#333333
+palette = 9=#f97b58
+palette = 10=#acd1a8
+palette = 11=#fac761
+palette = 12=#85add6
+palette = 13=#d8b6d8
+palette = 14=#82c4c4
+palette = 15=#ffffff
+background = 343d46
+foreground = d8dee9
+cursor-color = fcbb6a
+selection-background = 4e5a65
+selection-foreground = d8dee9