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/Vercel

@@ -0,0 +1,22 @@
+palette = 0=#000000
+palette = 1=#fc0036
+palette = 2=#29a948
+palette = 3=#ffae00
+palette = 4=#006aff
+palette = 5=#f32882
+palette = 6=#00ac96
+palette = 7=#feffff
+palette = 8=#a8a8a8
+palette = 9=#ff8080
+palette = 10=#4be15d
+palette = 11=#ffae00
+palette = 12=#49aeff
+palette = 13=#f97ea8
+palette = 14=#00e4c4
+palette = 15=#fefefe
+background = #101010
+foreground = #fafafa
+cursor-color = #f32882
+cursor-text = #fafafa
+selection-background = #005be7
+selection-foreground = #fafafa