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/IR Black

@@ -0,0 +1,22 @@
+palette = 0=#4f4f4f
+palette = 1=#fa6c60
+palette = 2=#a8ff60
+palette = 3=#fffeb7
+palette = 4=#96cafe
+palette = 5=#fa73fd
+palette = 6=#c6c5fe
+palette = 7=#efedef
+palette = 8=#7b7b7b
+palette = 9=#fcb6b0
+palette = 10=#cfffab
+palette = 11=#ffffcc
+palette = 12=#b5dcff
+palette = 13=#fb9cfe
+palette = 14=#e0e0fe
+palette = 15=#ffffff
+background = #000000
+foreground = #f1f1f1
+cursor-color = #808080
+cursor-text = #ffffff
+selection-background = #b5d5ff
+selection-foreground = #000000