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/Poimandres Storm

@@ -0,0 +1,22 @@
+palette = 0=#252b37
+palette = 1=#d0679d
+palette = 2=#5de4c7
+palette = 3=#fffac2
+palette = 4=#89ddff
+palette = 5=#f087bd
+palette = 6=#89ddff
+palette = 7=#ffffff
+palette = 8=#a6accd
+palette = 9=#d0679d
+palette = 10=#5de4c7
+palette = 11=#fffac2
+palette = 12=#add7ff
+palette = 13=#f087bd
+palette = 14=#add7ff
+palette = 15=#ffffff
+background = #252b37
+foreground = #a6accd
+cursor-color = #ffffff
+cursor-text = #252b37
+selection-background = #a6accd
+selection-foreground = #ffffff