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/Firefly Traditional

@@ -0,0 +1,22 @@
+palette = 0=#000000
+palette = 1=#c23720
+palette = 2=#33bc26
+palette = 3=#afad24
+palette = 4=#5a63ff
+palette = 5=#d53ad2
+palette = 6=#33bbc7
+palette = 7=#cccccc
+palette = 8=#828282
+palette = 9=#ff3b1e
+palette = 10=#2ee720
+palette = 11=#ecec16
+palette = 12=#838dff
+palette = 13=#ff5cfe
+palette = 14=#29f0f0
+palette = 15=#ebebeb
+background = #000000
+foreground = #f5f5f5
+cursor-color = #00f900
+cursor-text = #999999
+selection-background = #cfeac6
+selection-foreground = #000000