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/Sleepy Hollow

@@ -0,0 +1,22 @@
+palette = 0=#572100
+palette = 1=#ba3934
+palette = 2=#91773f
+palette = 3=#b55600
+palette = 4=#5f63b4
+palette = 5=#a17c7b
+palette = 6=#8faea9
+palette = 7=#af9a91
+palette = 8=#4e4b61
+palette = 9=#d9443f
+palette = 10=#d6b04e
+palette = 11=#f66813
+palette = 12=#8086ef
+palette = 13=#e2c2bb
+palette = 14=#a4dce7
+palette = 15=#d2c7a9
+background = #121214
+foreground = #af9a91
+cursor-color = #af9a91
+cursor-text = #391a02
+selection-background = #575256
+selection-foreground = #d2c7a9