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/Alien Blood

@@ -0,0 +1,22 @@
+palette = 0=#112616
+palette = 1=#7f2b27
+palette = 2=#2f7e25
+palette = 3=#717f24
+palette = 4=#2f6a7f
+palette = 5=#47587f
+palette = 6=#327f77
+palette = 7=#647d75
+palette = 8=#3c4812
+palette = 9=#e08009
+palette = 10=#18e000
+palette = 11=#bde000
+palette = 12=#00aae0
+palette = 13=#0058e0
+palette = 14=#00e0c4
+palette = 15=#73fa91
+background = #0f1610
+foreground = #637d75
+cursor-color = #73fa91
+cursor-text = #0f1610
+selection-background = #1d4125
+selection-foreground = #73fa91