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/Darkmatrix

@@ -0,0 +1,22 @@
+palette = 0=#091013
+palette = 1=#006536
+palette = 2=#6fa64c
+palette = 3=#7e8000
+palette = 4=#2c9a84
+palette = 5=#523a60
+palette = 6=#114d53
+palette = 7=#006536
+palette = 8=#404040
+palette = 9=#00733d
+palette = 10=#90d762
+palette = 11=#e2e500
+palette = 12=#46d8b8
+palette = 13=#573d66
+palette = 14=#12545a
+palette = 15=#006536
+background = #070c0e
+foreground = #3e5715
+cursor-color = #9fa86e
+cursor-text = #00ff87
+selection-background = #0f191c
+selection-foreground = #00ff87