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/IC Orange PPL

@@ -0,0 +1,22 @@
+palette = 0=#000000
+palette = 1=#c13900
+palette = 2=#a4a900
+palette = 3=#caaf00
+palette = 4=#bd6d00
+palette = 5=#fc5e00
+palette = 6=#f79500
+palette = 7=#ffc88a
+palette = 8=#6a4f2a
+palette = 9=#ff8c68
+palette = 10=#f6ff40
+palette = 11=#ffe36e
+palette = 12=#ffbe55
+palette = 13=#fc874f
+palette = 14=#c69752
+palette = 15=#fafaff
+background = #262626
+foreground = #ffcb83
+cursor-color = #fc531d
+cursor-text = #ffc88a
+selection-background = #c14020
+selection-foreground = #ffc88a