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/Aurora

@@ -0,0 +1,22 @@
+palette = 0=#23262e
+palette = 1=#f0266f
+palette = 2=#8fd46d
+palette = 3=#ffe66d
+palette = 4=#102ee4
+palette = 5=#ee5d43
+palette = 6=#03d6b8
+palette = 7=#c74ded
+palette = 8=#4f545e
+palette = 9=#f92672
+palette = 10=#8fd46d
+palette = 11=#ffe66d
+palette = 12=#03d6b8
+palette = 13=#ee5d43
+palette = 14=#03d6b8
+palette = 15=#c74ded
+background = #23262e
+foreground = #ffca28
+cursor-color = #ee5d43
+cursor-text = #ffd29c
+selection-background = #292e38
+selection-foreground = #00e8c6