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/Borland

@@ -0,0 +1,22 @@
+palette = 0=#4f4f4f
+palette = 1=#ff6c60
+palette = 2=#a8ff60
+palette = 3=#ffffb6
+palette = 4=#96cbfe
+palette = 5=#ff73fd
+palette = 6=#c6c5fe
+palette = 7=#eeeeee
+palette = 8=#7c7c7c
+palette = 9=#ffb6b0
+palette = 10=#ceffac
+palette = 11=#ffffcc
+palette = 12=#b5dcff
+palette = 13=#ff9cfe
+palette = 14=#dfdffe
+palette = 15=#ffffff
+background = #0000a4
+foreground = #ffff4e
+cursor-color = #ffa560
+cursor-text = #ffffff
+selection-background = #a4a4a4
+selection-foreground = #0000a4