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/Raycast Dark

@@ -0,0 +1,22 @@
+palette = 0=#000000
+palette = 1=#ff5360
+palette = 2=#59d499
+palette = 3=#ffc531
+palette = 4=#56c2ff
+palette = 5=#cf2f98
+palette = 6=#52eee5
+palette = 7=#ffffff
+palette = 8=#4c4c4c
+palette = 9=#ff6363
+palette = 10=#59d499
+palette = 11=#ffc531
+palette = 12=#56c2ff
+palette = 13=#cf2f98
+palette = 14=#52eee5
+palette = 15=#ffffff
+background = #1a1a1a
+foreground = #ffffff
+cursor-color = #cccccc
+cursor-text = #999999
+selection-background = #333333
+selection-foreground = #595959