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/Blue Berry Pie

@@ -0,0 +1,22 @@
+palette = 0=#0a4c62
+palette = 1=#99246e
+palette = 2=#5cb1b3
+palette = 3=#eab9a8
+palette = 4=#90a5bd
+palette = 5=#9d54a7
+palette = 6=#7e83cc
+palette = 7=#f0e8d6
+palette = 8=#463c5d
+palette = 9=#c87272
+palette = 10=#0a6c7e
+palette = 11=#7a3188
+palette = 12=#5f3d63
+palette = 13=#bc94b7
+palette = 14=#5e6071
+palette = 15=#0a6c7e
+background = #1c0c28
+foreground = #babab9
+cursor-color = #fcfad6
+cursor-text = #000000
+selection-background = #606060
+selection-foreground = #ffffff