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/Toy Chest

@@ -0,0 +1,22 @@
+palette = 0=#2c3f58
+palette = 1=#be2d26
+palette = 2=#1a9172
+palette = 3=#db8e27
+palette = 4=#325d96
+palette = 5=#8a5edc
+palette = 6=#35a08f
+palette = 7=#23d183
+palette = 8=#336889
+palette = 9=#dd5944
+palette = 10=#31d07b
+palette = 11=#e7d84b
+palette = 12=#34a6da
+palette = 13=#ae6bdc
+palette = 14=#42c3ae
+palette = 15=#d5d5d5
+background = #24364b
+foreground = #31d07b
+cursor-color = #d5d5d5
+cursor-text = #141c25
+selection-background = #5f217a
+selection-foreground = #d5d5d5