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/Dot Gov

@@ -0,0 +1,22 @@
+palette = 0=#191919
+palette = 1=#bf091d
+palette = 2=#3d9751
+palette = 3=#f6bb34
+palette = 4=#17b2e0
+palette = 5=#7830b0
+palette = 6=#8bd2ed
+palette = 7=#ffffff
+palette = 8=#595959
+palette = 9=#bf091d
+palette = 10=#3d9751
+palette = 11=#f6bb34
+palette = 12=#17b2e0
+palette = 13=#7830b0
+palette = 14=#8bd2ed
+palette = 15=#ffffff
+background = #262c35
+foreground = #ebebeb
+cursor-color = #d9002f
+cursor-text = #ffffff
+selection-background = #1a4080
+selection-foreground = #ffffff