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/Zenwritten Dark

@@ -0,0 +1,22 @@
+palette = 0=#191919
+palette = 1=#de6e7c
+palette = 2=#819b69
+palette = 3=#b77e64
+palette = 4=#6099c0
+palette = 5=#b279a7
+palette = 6=#66a5ad
+palette = 7=#bbbbbb
+palette = 8=#4a4546
+palette = 9=#e8838f
+palette = 10=#8bae68
+palette = 11=#d68c67
+palette = 12=#61abda
+palette = 13=#cf86c1
+palette = 14=#65b8c1
+palette = 15=#8e8e8e
+background = #191919
+foreground = #bbbbbb
+cursor-color = #c9c9c9
+cursor-text = #191919
+selection-background = #404040
+selection-foreground = #bbbbbb