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/Shades Of Purple

@@ -0,0 +1,22 @@
+palette = 0=#000000
+palette = 1=#d90429
+palette = 2=#3ad900
+palette = 3=#ffe700
+palette = 4=#6943ff
+palette = 5=#ff2c70
+palette = 6=#00c5c7
+palette = 7=#c7c7c7
+palette = 8=#686868
+palette = 9=#f92a1c
+palette = 10=#43d426
+palette = 11=#f1d000
+palette = 12=#6871ff
+palette = 13=#ff77ff
+palette = 14=#79e8fb
+palette = 15=#ffffff
+background = #1e1d40
+foreground = #ffffff
+cursor-color = #fad000
+cursor-text = #98998e
+selection-background = #b362ff
+selection-foreground = #c2c2c2