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/Cobalt Next Minimal

@@ -0,0 +1,22 @@
+palette = 0=#323d47
+palette = 1=#ff657a
+palette = 2=#8cc98f
+palette = 3=#ffc64c
+palette = 4=#409dd4
+palette = 5=#cba3c7
+palette = 6=#37b5b4
+palette = 7=#d7deea
+palette = 8=#62747f
+palette = 9=#e47e8b
+palette = 10=#baddbb
+palette = 11=#ffdc91
+palette = 12=#7ac0eb
+palette = 13=#f3ccef
+palette = 14=#84e4e3
+palette = 15=#ffffff
+background = #0b1c24
+foreground = #d7deea
+cursor-color = #37b5b4
+cursor-text = #ffffff
+selection-background = #37b5b4
+selection-foreground = #ffffff