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/Espresso Libre

@@ -0,0 +1,22 @@
+palette = 0=#000000
+palette = 1=#cc0000
+palette = 2=#1a921c
+palette = 3=#f0e53a
+palette = 4=#0066ff
+palette = 5=#c5656b
+palette = 6=#06989a
+palette = 7=#d3d7cf
+palette = 8=#555753
+palette = 9=#ef2929
+palette = 10=#9aff87
+palette = 11=#fffb5c
+palette = 12=#43a8ed
+palette = 13=#ff818a
+palette = 14=#34e2e2
+palette = 15=#eeeeec
+background = #2a211c
+foreground = #b8a898
+cursor-color = #ffffff
+cursor-text = #000000
+selection-background = #c3dcff
+selection-foreground = #ab9b8b