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/Embark

@@ -0,0 +1,22 @@
+palette = 0=#1e1c31
+palette = 1=#f0719b
+palette = 2=#a1efd3
+palette = 3=#ffe9aa
+palette = 4=#57c7ff
+palette = 5=#c792ea
+palette = 6=#87dfeb
+palette = 7=#f8f8f2
+palette = 8=#585273
+palette = 9=#f02e6e
+palette = 10=#2ce592
+palette = 11=#ffb378
+palette = 12=#1da0e2
+palette = 13=#a742ea
+palette = 14=#63f2f1
+palette = 15=#a6b3cc
+background = #1e1c31
+foreground = #eeffff
+cursor-color = #a1efd3
+cursor-text = #1e1c31
+selection-background = #fbfcfc
+selection-foreground = #1e1c31