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
