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/IBM 5153 CGA

@@ -0,0 +1,22 @@
+palette = 0=#141414
+palette = 1=#d03333
+palette = 2=#1bd01b
+palette = 3=#d08c1b
+palette = 4=#1b1bd0
+palette = 5=#d01bd0
+palette = 6=#1bd0d0
+palette = 7=#cecece
+palette = 8=#4e4e4e
+palette = 9=#dc4e4e
+palette = 10=#4edc4e
+palette = 11=#f3f34e
+palette = 12=#4e4edc
+palette = 13=#f34ef3
+palette = 14=#4ef3f3
+palette = 15=#ffffff
+background = #141414
+foreground = #cecece
+cursor-color = #cecece
+cursor-text = #141414
+selection-background = #cecece
+selection-foreground = #141414