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/One Double Dark

@@ -0,0 +1,22 @@
+palette = 0=#3d4452
+palette = 1=#f16372
+palette = 2=#8cc570
+palette = 3=#ecbe70
+palette = 4=#3fb1f5
+palette = 5=#d373e3
+palette = 6=#17b9c4
+palette = 7=#dbdfe5
+palette = 8=#525d6f
+palette = 9=#ff777b
+palette = 10=#82d882
+palette = 11=#f5c065
+palette = 12=#6dcaff
+palette = 13=#ff7bf4
+palette = 14=#00e5fb
+palette = 15=#f7f9fc
+background = #282c34
+foreground = #dbdfe5
+cursor-color = #f5e0dc
+cursor-text = #9aa3c1
+selection-background = #585b70
+selection-foreground = #cdd6f4