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/Calamity

@@ -0,0 +1,22 @@
+palette = 0=#2f2833
+palette = 1=#fc644d
+palette = 2=#a5f69c
+palette = 3=#e9d7a5
+palette = 4=#3b79c7
+palette = 5=#f92672
+palette = 6=#74d3de
+palette = 7=#d5ced9
+palette = 8=#7e6c88
+palette = 9=#fc644d
+palette = 10=#a5f69c
+palette = 11=#e9d7a5
+palette = 12=#3b79c7
+palette = 13=#f92672
+palette = 14=#74d3de
+palette = 15=#ffffff
+background = #2f2833
+foreground = #d5ced9
+cursor-color = #d5ced9
+cursor-text = #2f2833
+selection-background = #7e6c88
+selection-foreground = #d5ced9