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/Kanagawabones

@@ -0,0 +1,22 @@
+palette = 0=#1f1f28
+palette = 1=#e46a78
+palette = 2=#98bc6d
+palette = 3=#e5c283
+palette = 4=#7eb3c9
+palette = 5=#957fb8
+palette = 6=#7eb3c9
+palette = 7=#ddd8bb
+palette = 8=#49495e
+palette = 9=#ec818c
+palette = 10=#9ec967
+palette = 11=#f1c982
+palette = 12=#7bc2df
+palette = 13=#a98fd2
+palette = 14=#7bc2df
+palette = 15=#a8a48d
+background = #1f1f28
+foreground = #ddd8bb
+cursor-color = #e6e0c2
+cursor-text = #1f1f28
+selection-background = #49473e
+selection-foreground = #ddd8bb