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/Solarized Dark Higher Contrast

@@ -0,0 +1,22 @@
+palette = 0=#002831
+palette = 1=#d11c24
+palette = 2=#6cbe6c
+palette = 3=#a57706
+palette = 4=#2176c7
+palette = 5=#c61c6f
+palette = 6=#259286
+palette = 7=#eae3cb
+palette = 8=#006488
+palette = 9=#f5163b
+palette = 10=#51ef84
+palette = 11=#b27e28
+palette = 12=#178ec8
+palette = 13=#e24d8e
+palette = 14=#00b39e
+palette = 15=#fcf4dc
+background = #001e27
+foreground = #9cc2c3
+cursor-color = #f34b00
+cursor-text = #002831
+selection-background = #003748
+selection-foreground = #7a8f8e