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/Belafonte Day

@@ -0,0 +1,22 @@
+palette = 0=#20111b
+palette = 1=#be100e
+palette = 2=#858162
+palette = 3=#d08b30
+palette = 4=#426a79
+palette = 5=#97522c
+palette = 6=#989a9c
+palette = 7=#968c83
+palette = 8=#5e5252
+palette = 9=#be100e
+palette = 10=#858162
+palette = 11=#d08b30
+palette = 12=#426a79
+palette = 13=#97522c
+palette = 14=#989a9c
+palette = 15=#d5ccba
+background = #d5ccba
+foreground = #45373c
+cursor-color = #45373c
+cursor-text = #d5ccba
+selection-background = #968c83
+selection-foreground = #45373c