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/GitHub Light Colorblind

@@ -0,0 +1,22 @@
+palette = 0=#24292f
+palette = 1=#b35900
+palette = 2=#0550ae
+palette = 3=#4d2d00
+palette = 4=#0969da
+palette = 5=#8250df
+palette = 6=#1b7c83
+palette = 7=#6e7781
+palette = 8=#57606a
+palette = 9=#8a4600
+palette = 10=#0969da
+palette = 11=#633c01
+palette = 12=#218bff
+palette = 13=#a475f9
+palette = 14=#3192aa
+palette = 15=#8c959f
+background = #ffffff
+foreground = #24292f
+cursor-color = #0969da
+cursor-text = #3c9cff
+selection-background = #24292f
+selection-foreground = #ffffff