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/Vibrant Ink

@@ -0,0 +1,22 @@
+palette = 0=#878787
+palette = 1=#ff6600
+palette = 2=#ccff04
+palette = 3=#ffcc00
+palette = 4=#44b4cc
+palette = 5=#9933cc
+palette = 6=#44b4cc
+palette = 7=#f5f5f5
+palette = 8=#555555
+palette = 9=#ff0000
+palette = 10=#00ff00
+palette = 11=#ffff00
+palette = 12=#0000ff
+palette = 13=#ff00ff
+palette = 14=#00ffff
+palette = 15=#e5e5e5
+background = #000000
+foreground = #ffffff
+cursor-color = #ffffff
+cursor-text = #000000
+selection-background = #b5d5ff
+selection-foreground = #000000