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/Kurokula

@@ -0,0 +1,22 @@
+palette = 0=#333333
+palette = 1=#c35a52
+palette = 2=#78b3a9
+palette = 3=#e1b917
+palette = 4=#5c91dd
+palette = 5=#8b79a6
+palette = 6=#867268
+palette = 7=#e0cfc2
+palette = 8=#515151
+palette = 9=#ffc34c
+palette = 10=#afffa5
+palette = 11=#fff700
+palette = 12=#90dbff
+palette = 13=#ad93ff
+palette = 14=#ffcdb6
+palette = 15=#ffffff
+background = #141515
+foreground = #e0cfc2
+cursor-color = #7a1c1c
+cursor-text = #fffbf2
+selection-background = #515151
+selection-foreground = #ffc34c