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/Duotone Dark

@@ -0,0 +1,22 @@
+palette = 0=#1f1d27
+palette = 1=#d9393e
+palette = 2=#2dcd73
+palette = 3=#d9b76e
+palette = 4=#ffc284
+palette = 5=#de8d40
+palette = 6=#2488ff
+palette = 7=#b7a1ff
+palette = 8=#4e4a60
+palette = 9=#d9393e
+palette = 10=#2dcd73
+palette = 11=#d9b76e
+palette = 12=#ffc284
+palette = 13=#de8d40
+palette = 14=#2488ff
+palette = 15=#eae5ff
+background = #1f1d27
+foreground = #b7a1ff
+cursor-color = #ff9839
+cursor-text = #1f1d27
+selection-background = #353147
+selection-foreground = #b7a2ff