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/Adventure Time

@@ -0,0 +1,22 @@
+palette = 0=#050404
+palette = 1=#bd0013
+palette = 2=#4ab118
+palette = 3=#e7741e
+palette = 4=#0f4ac6
+palette = 5=#665993
+palette = 6=#70a598
+palette = 7=#f8dcc0
+palette = 8=#4e7cbf
+palette = 9=#fc5f5a
+palette = 10=#9eff6e
+palette = 11=#efc11a
+palette = 12=#1997c6
+palette = 13=#9b5953
+palette = 14=#c8faf4
+palette = 15=#f6f5fb
+background = #1f1d45
+foreground = #f8dcc0
+cursor-color = #efbf38
+cursor-text = #08080a
+selection-background = #706b4e
+selection-foreground = #f3d9c4