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/Pro Light

@@ -0,0 +1,22 @@
+palette = 0=#000000
+palette = 1=#e5492b
+palette = 2=#50d148
+palette = 3=#c6c440
+palette = 4=#3b75ff
+palette = 5=#ed66e8
+palette = 6=#4ed2de
+palette = 7=#c2c2c2
+palette = 8=#9f9f9f
+palette = 9=#ff6640
+palette = 10=#48d53e
+palette = 11=#bfbe23
+palette = 12=#0082ff
+palette = 13=#ff7eff
+palette = 14=#3bd1d2
+palette = 15=#f2f2f2
+background = #ffffff
+foreground = #191919
+cursor-color = #4d4d4d
+cursor-text = #f2f2f2
+selection-background = #c1ddff
+selection-foreground = #191919