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/Ayu Light

@@ -0,0 +1,22 @@
+palette = 0=#000000
+palette = 1=#ea6c6d
+palette = 2=#6cbf43
+palette = 3=#eca944
+palette = 4=#3199e1
+palette = 5=#9e75c7
+palette = 6=#46ba94
+palette = 7=#bababa
+palette = 8=#686868
+palette = 9=#f07171
+palette = 10=#86b300
+palette = 11=#f2ae49
+palette = 12=#399ee6
+palette = 13=#a37acc
+palette = 14=#4cbf99
+palette = 15=#d1d1d1
+background = #f8f9fa
+foreground = #5c6166
+cursor-color = #ffaa33
+cursor-text = #f8f9fa
+selection-background = #035bd6
+selection-foreground = #f8f9fa