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/Zenbones

@@ -0,0 +1,22 @@
+palette = 0=#f0edec
+palette = 1=#a8334c
+palette = 2=#4f6c31
+palette = 3=#944927
+palette = 4=#286486
+palette = 5=#88507d
+palette = 6=#3b8992
+palette = 7=#2c363c
+palette = 8=#b5a7a0
+palette = 9=#94253e
+palette = 10=#3f5a22
+palette = 11=#803d1c
+palette = 12=#1d5573
+palette = 13=#7b3b70
+palette = 14=#2b747c
+palette = 15=#4f5e68
+background = #f0edec
+foreground = #2c363c
+cursor-color = #2c363c
+cursor-text = #f0edec
+selection-background = #cbd9e3
+selection-foreground = #2c363c