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/Miasma

@@ -0,0 +1,22 @@
+palette = 0=#000000
+palette = 1=#685742
+palette = 2=#5f875f
+palette = 3=#b36d43
+palette = 4=#78824b
+palette = 5=#bb7744
+palette = 6=#c9a554
+palette = 7=#d7c483
+palette = 8=#666666
+palette = 9=#685742
+palette = 10=#5f875f
+palette = 11=#b36d43
+palette = 12=#78824b
+palette = 13=#bb7744
+palette = 14=#c9a554
+palette = 15=#d7c483
+background = #222222
+foreground = #c2c2b0
+cursor-color = #c7c7c7
+cursor-text = #959595
+selection-background = #e5c47b
+selection-foreground = #000000