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/Operator Mono Dark

@@ -0,0 +1,22 @@
+palette = 0=#5a5a5a
+palette = 1=#ca372d
+palette = 2=#4d7b3a
+palette = 3=#d4d697
+palette = 4=#4387cf
+palette = 5=#b86cb4
+palette = 6=#72d5c6
+palette = 7=#ced4cd
+palette = 8=#9a9b99
+palette = 9=#c37d62
+palette = 10=#83d0a2
+palette = 11=#fdfdc5
+palette = 12=#89d3f6
+palette = 13=#ff2c7a
+palette = 14=#82eada
+palette = 15=#fdfdf6
+background = #191919
+foreground = #c3cac2
+cursor-color = #fcdc08
+cursor-text = #161616
+selection-background = #19273b
+selection-foreground = #dde5dc