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/Sunset Drive

@@ -0,0 +1,22 @@
+palette = 0=#0a0a13
+palette = 1=#ff0063
+palette = 2=#00f992
+palette = 3=#ffe900
+palette = 4=#00a4ff
+palette = 5=#ff57fd
+palette = 6=#00ffed
+palette = 7=#ededff
+palette = 8=#3e3e4b
+palette = 9=#ff948b
+palette = 10=#00fcb9
+palette = 11=#ffff68
+palette = 12=#3ea0ff
+palette = 13=#ff93ff
+palette = 14=#38ffff
+palette = 15=#f8f8ff
+background = #0f0f1a
+foreground = #ededfe
+cursor-color = #ededfe
+cursor-text = #0f0f1a
+selection-background = #202036
+selection-foreground = #ededff