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 Darcula

@@ -0,0 +1,22 @@
+palette = 0=#25292a
+palette = 1=#f24840
+palette = 2=#629655
+palette = 3=#b68800
+palette = 4=#2075c7
+palette = 5=#797fd4
+palette = 6=#15968d
+palette = 7=#d2d8d9
+palette = 8=#65696a
+palette = 9=#f24840
+palette = 10=#629655
+palette = 11=#b68800
+palette = 12=#2075c7
+palette = 13=#797fd4
+palette = 14=#15968d
+palette = 15=#d2d8d9
+background = #3d3f41
+foreground = #d2d8d9
+cursor-color = #708284
+cursor-text = #002831
+selection-background = #214283
+selection-foreground = #d2d8d9