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/Grape

@@ -0,0 +1,22 @@
+palette = 0=#2d283f
+palette = 1=#ed2261
+palette = 2=#1fa91b
+palette = 3=#8ddc20
+palette = 4=#487df4
+palette = 5=#8d35c9
+palette = 6=#3bdeed
+palette = 7=#9e9ea0
+palette = 8=#59516a
+palette = 9=#f0729a
+palette = 10=#53aa5e
+palette = 11=#b2dc87
+palette = 12=#a9bcec
+palette = 13=#ad81c2
+palette = 14=#9de3eb
+palette = 15=#a288f7
+background = #171423
+foreground = #9f9fa1
+cursor-color = #a288f7
+cursor-text = #171422
+selection-background = #493d70
+selection-foreground = #171422