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/Unikitty

@@ -0,0 +1,22 @@
+palette = 0=#0c0c0c
+palette = 1=#a80f20
+palette = 2=#c7ff98
+palette = 3=#fff964
+palette = 4=#145fcd
+palette = 5=#ffe9ff
+palette = 6=#9effef
+palette = 7=#fcf1fb
+palette = 8=#434343
+palette = 9=#d91329
+palette = 10=#d3ffaf
+palette = 11=#ffef50
+palette = 12=#0075ea
+palette = 13=#ffefff
+palette = 14=#93ffef
+palette = 15=#fff3fe
+background = #ff8cd9
+foreground = #0b0b0b
+cursor-color = #c7ff98
+cursor-text = #202020
+selection-background = #3ea9fe
+selection-foreground = #ffffff