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/Pandora

@@ -0,0 +1,22 @@
+palette = 0=#000000
+palette = 1=#ff4242
+palette = 2=#74af68
+palette = 3=#ffad29
+palette = 4=#338f86
+palette = 5=#9414e6
+palette = 6=#23d7d7
+palette = 7=#e2e2e2
+palette = 8=#3f5648
+palette = 9=#ff3242
+palette = 10=#74cd68
+palette = 11=#ffb929
+palette = 12=#23d7d7
+palette = 13=#ff37ff
+palette = 14=#00ede1
+palette = 15=#ffffff
+background = #141e43
+foreground = #e1e1e1
+cursor-color = #43d58e
+cursor-text = #ffffff
+selection-background = #2d37ff
+selection-foreground = #82e0ff