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/IRIX Terminal

@@ -0,0 +1,22 @@
+palette = 0=#1a1919
+palette = 1=#ff2b1e
+palette = 2=#57ff3d
+palette = 3=#ffff44
+palette = 4=#0004ff
+palette = 5=#ff2cff
+palette = 6=#56ffff
+palette = 7=#ffffff
+palette = 8=#ffff44
+palette = 9=#ffff44
+palette = 10=#ffff44
+palette = 11=#fffc72
+palette = 12=#ffff44
+palette = 13=#ffff44
+palette = 14=#ffff44
+palette = 15=#ffff44
+background = #000043
+foreground = #f2f2f2
+cursor-color = #c7c7c7
+cursor-text = #8c8c8c
+selection-background = #c2deff
+selection-foreground = #000000