add ghostty config and theme

configs/ghostty_g/themes/rebecca

@@ -0,0 +1,21 @@
+palette = 0=#12131e
+palette = 1=#dd7755
+palette = 2=#04dbb5
+palette = 3=#f2e7b7
+palette = 4=#7aa5ff
+palette = 5=#bf9cf9
+palette = 6=#56d3c2
+palette = 7=#e4e3e9
+palette = 8=#666699
+palette = 9=#ff92cd
+palette = 10=#01eac0
+palette = 11=#fffca8
+palette = 12=#69c0fa
+palette = 13=#c17ff8
+palette = 14=#8bfde1
+palette = 15=#f4f2f9
+background = 292a44
+foreground = e8e6ed
+cursor-color = b89bf9
+selection-background = 663399
+selection-foreground = f4f2f9