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/Primary

@@ -0,0 +1,22 @@
+palette = 0=#000000
+palette = 1=#db4437
+palette = 2=#0f9d58
+palette = 3=#f4b400
+palette = 4=#4285f4
+palette = 5=#db4437
+palette = 6=#4285f4
+palette = 7=#bfbfbf
+palette = 8=#000000
+palette = 9=#db4437
+palette = 10=#0f9d58
+palette = 11=#f4b400
+palette = 12=#4285f4
+palette = 13=#4285f4
+palette = 14=#0f9d58
+palette = 15=#ffffff
+background = #ffffff
+foreground = #000000
+cursor-color = #000000
+cursor-text = #ffffff
+selection-background = #656565
+selection-foreground = #eeeeee