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/Violet Light

@@ -0,0 +1,22 @@
+palette = 0=#56595c
+palette = 1=#c94c22
+palette = 2=#85981c
+palette = 3=#b4881d
+palette = 4=#2e8bce
+palette = 5=#d13a82
+palette = 6=#32a198
+palette = 7=#b9b6af
+palette = 8=#45484b
+palette = 9=#bd3613
+palette = 10=#738a04
+palette = 11=#a57705
+palette = 12=#2176c7
+palette = 13=#c61c6f
+palette = 14=#259286
+palette = 15=#c9c6bd
+background = #fcf4dc
+foreground = #536870
+cursor-color = #536870
+cursor-text = #fcf4dc
+selection-background = #595ab7
+selection-foreground = #fcf4dc