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/No Clown Fiesta

@@ -0,0 +1,22 @@
+palette = 0=#151515
+palette = 1=#b46958
+palette = 2=#90a959
+palette = 3=#f4bf75
+palette = 4=#bad7ff
+palette = 5=#aa759f
+palette = 6=#88afa2
+palette = 7=#e1e1e1
+palette = 8=#727272
+palette = 9=#7e97ab
+palette = 10=#90a959
+palette = 11=#f4bf75
+palette = 12=#bad7ff
+palette = 13=#aa759f
+palette = 14=#88afa2
+palette = 15=#afafaf
+background = #101010
+foreground = #e0e1e4
+cursor-color = #e0e1e4
+cursor-text = #18191b
+selection-background = #696d79
+selection-foreground = #e0e1e4