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/branch

@@ -0,0 +1,22 @@
+palette = 0=#35241c
+palette = 1=#c2562d
+palette = 2=#96a65e
+palette = 3=#d29b5a
+palette = 4=#3b8e8c
+palette = 5=#c47e5b
+palette = 6=#639a90
+palette = 7=#cfc1a9
+palette = 8=#564a45
+palette = 9=#c2562d
+palette = 10=#96a65e
+palette = 11=#d29b5a
+palette = 12=#3b8e8c
+palette = 13=#c47e5b
+palette = 14=#639a90
+palette = 15=#cfc1a9
+background = #32221a
+foreground = #cfc1a9
+cursor-color = #cfc1a9
+cursor-text = #32221a
+selection-background = #cfc1a9
+selection-foreground = #32221a