feat(resources): bundle color themes and compiled xterm-ghostty terminfo

Makes the resources directory self-contained like Ghostty's share/ghostty:
- themes/: the 463 iTerm2-Color-Schemes themes Ghostty 1.3.1 ships
  (release 20260216-151611-fc73ce3), with the upstream MIT license.
- terminfo/: xterm-ghostty compiled with `tic -x` from the terminfo
  source generated by ghostty-termio; `infocmp -x` is identical to the
  installed Ghostty's entry.

The generator script and resources-dir discovery changes follow in a
separate commit.

Test Plan:
- TERMINFO=resources/terminfo infocmp -x xterm-ghostty

resources/themes/JetBrains Darcula

@@ -0,0 +1,22 @@
+palette = 0=#000000
+palette = 1=#fa5355
+palette = 2=#126e00
+palette = 3=#c2c300
+palette = 4=#4581eb
+palette = 5=#fa54ff
+palette = 6=#33c2c1
+palette = 7=#adadad
+palette = 8=#555555
+palette = 9=#fb7172
+palette = 10=#67ff4f
+palette = 11=#ffff00
+palette = 12=#6d9df1
+palette = 13=#fb82ff
+palette = 14=#60d3d1
+palette = 15=#eeeeee
+background = #202020
+foreground = #adadad
+cursor-color = #ffffff
+cursor-text = #000000
+selection-background = #1a3272
+selection-foreground = #adadad