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/Royal

@@ -0,0 +1,22 @@
+palette = 0=#241f2b
+palette = 1=#91284c
+palette = 2=#23801c
+palette = 3=#b49d27
+palette = 4=#6580b0
+palette = 5=#674d96
+palette = 6=#8aaabe
+palette = 7=#524966
+palette = 8=#3e3a4a
+palette = 9=#d5356c
+palette = 10=#2cd946
+palette = 11=#fde83b
+palette = 12=#90baf9
+palette = 13=#a479e3
+palette = 14=#acd4eb
+palette = 15=#9e8cbd
+background = #100815
+foreground = #514968
+cursor-color = #524966
+cursor-text = #100613
+selection-background = #1f1d2b
+selection-foreground = #a593cd