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/Seoulbones Dark

@@ -0,0 +1,22 @@
+palette = 0=#4b4b4b
+palette = 1=#e388a3
+palette = 2=#98bd99
+palette = 3=#ffdf9b
+palette = 4=#97bdde
+palette = 5=#a5a6c5
+palette = 6=#6fbdbe
+palette = 7=#dddddd
+palette = 8=#797172
+palette = 9=#eb99b1
+palette = 10=#8fcd92
+palette = 11=#ffe5b3
+palette = 12=#a2c8e9
+palette = 13=#b2b3da
+palette = 14=#6bcacb
+palette = 15=#a8a8a8
+background = #4b4b4b
+foreground = #dddddd
+cursor-color = #e2e2e2
+cursor-text = #4b4b4b
+selection-background = #777777
+selection-foreground = #dddddd