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/Homebrew

@@ -0,0 +1,22 @@
+palette = 0=#000000
+palette = 1=#990000
+palette = 2=#00a600
+palette = 3=#999900
+palette = 4=#0d0dbf
+palette = 5=#b200b2
+palette = 6=#00a6b2
+palette = 7=#bfbfbf
+palette = 8=#666666
+palette = 9=#e50000
+palette = 10=#00d900
+palette = 11=#e5e500
+palette = 12=#0000ff
+palette = 13=#e500e5
+palette = 14=#00e5e5
+palette = 15=#e5e5e5
+background = #000000
+foreground = #00ff00
+cursor-color = #23ff18
+cursor-text = #ff0018
+selection-background = #083905
+selection-foreground = #ffffff