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/Dimmed Monokai

@@ -0,0 +1,22 @@
+palette = 0=#3a3d43
+palette = 1=#be3f48
+palette = 2=#879a3b
+palette = 3=#c5a635
+palette = 4=#4f76a1
+palette = 5=#855c8d
+palette = 6=#578fa4
+palette = 7=#b9bcba
+palette = 8=#888987
+palette = 9=#fb001f
+palette = 10=#0f722f
+palette = 11=#c47033
+palette = 12=#186de3
+palette = 13=#fb0067
+palette = 14=#2e706d
+palette = 15=#fdffb9
+background = #1f1f1f
+foreground = #b9bcba
+cursor-color = #f83e19
+cursor-text = #171717
+selection-background = #2a2d32
+selection-foreground = #b9bcba