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/Sublette

@@ -0,0 +1,22 @@
+palette = 0=#253045
+palette = 1=#ee5577
+palette = 2=#55ee77
+palette = 3=#ffdd88
+palette = 4=#5588ff
+palette = 5=#ff77cc
+palette = 6=#44eeee
+palette = 7=#f5f5da
+palette = 8=#405570
+palette = 9=#ee6655
+palette = 10=#99ee77
+palette = 11=#ffff77
+palette = 12=#77bbff
+palette = 13=#aa88ff
+palette = 14=#55ffbb
+palette = 15=#ffffee
+background = #202535
+foreground = #ccced0
+cursor-color = #ccced0
+cursor-text = #202535
+selection-background = #ccced0
+selection-foreground = #202535