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/Later This Evening

@@ -0,0 +1,22 @@
+palette = 0=#2b2b2b
+palette = 1=#d45a60
+palette = 2=#afba67
+palette = 3=#e5d289
+palette = 4=#a0bad6
+palette = 5=#c092d6
+palette = 6=#91bfb7
+palette = 7=#494a4a
+palette = 8=#525454
+palette = 9=#d3232f
+palette = 10=#aabb39
+palette = 11=#e5be39
+palette = 12=#6699d6
+palette = 13=#ab53d6
+palette = 14=#5fc0ae
+palette = 15=#c1c2c2
+background = #222222
+foreground = #959595
+cursor-color = #4f4f4f
+cursor-text = #959595
+selection-background = #424242
+selection-foreground = #959595