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/owl

@@ -0,0 +1,22 @@
+palette = 0=#302c2c
+palette = 1=#5a5a5a
+palette = 2=#989898
+palette = 3=#cacaca
+palette = 4=#656565
+palette = 5=#b1b1b1
+palette = 6=#7f7f7f
+palette = 7=#dedede
+palette = 8=#5d595b
+palette = 9=#da5b2c
+palette = 10=#989898
+palette = 11=#cacaca
+palette = 12=#656565
+palette = 13=#b1b1b1
+palette = 14=#7f7f7f
+palette = 15=#ffffff
+background = #2f2b2c
+foreground = #dedede
+cursor-color = #dedede
+cursor-text = #2f2b2c
+selection-background = #dedede
+selection-foreground = #2f2b2c