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/Matrix

@@ -0,0 +1,22 @@
+palette = 0=#0f191c
+palette = 1=#23755a
+palette = 2=#82d967
+palette = 3=#ffd700
+palette = 4=#3f5242
+palette = 5=#409931
+palette = 6=#50b45a
+palette = 7=#507350
+palette = 8=#688060
+palette = 9=#2fc079
+palette = 10=#90d762
+palette = 11=#faff00
+palette = 12=#4f7e7e
+palette = 13=#11ff25
+palette = 14=#c1ff8a
+palette = 15=#678c61
+background = #0f191c
+foreground = #426644
+cursor-color = #384545
+cursor-text = #00ff00
+selection-background = #18282e
+selection-foreground = #00ff87