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/Tango Half Adapted

@@ -0,0 +1,22 @@
+palette = 0=#000000
+palette = 1=#ff0000
+palette = 2=#4cc300
+palette = 3=#e2c000
+palette = 4=#008ef6
+palette = 5=#a96cb3
+palette = 6=#00bdc3
+palette = 7=#babfb5
+palette = 8=#797d76
+palette = 9=#ff0013
+palette = 10=#70dc00
+palette = 11=#d9c600
+palette = 12=#76bfff
+palette = 13=#d898d1
+palette = 14=#00d0d4
+palette = 15=#f4f4f2
+background = #ffffff
+foreground = #000000
+cursor-color = #000000
+cursor-text = #ffffff
+selection-background = #c1deff
+selection-foreground = #000000