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/Glacier

@@ -0,0 +1,22 @@
+palette = 0=#2e343c
+palette = 1=#bd0f2f
+palette = 2=#35a770
+palette = 3=#fb9435
+palette = 4=#1f5872
+palette = 5=#bd2523
+palette = 6=#778397
+palette = 7=#ffffff
+palette = 8=#404a55
+palette = 9=#bd0f2f
+palette = 10=#49e998
+palette = 11=#fddf6e
+palette = 12=#2a8bc1
+palette = 13=#ea4727
+palette = 14=#a0b6d3
+palette = 15=#ffffff
+background = #0c1115
+foreground = #ffffff
+cursor-color = #6c6c6c
+cursor-text = #9f9f9f
+selection-background = #bd2523
+selection-foreground = #ffffff