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/Duckbones

@@ -0,0 +1,22 @@
+palette = 0=#0e101a
+palette = 1=#e03600
+palette = 2=#5dcd97
+palette = 3=#e39500
+palette = 4=#00a3cb
+palette = 5=#795ccc
+palette = 6=#00a3cb
+palette = 7=#ebefc0
+palette = 8=#444860
+palette = 9=#ff4821
+palette = 10=#58db9e
+palette = 11=#f6a100
+palette = 12=#00b4e0
+palette = 13=#b3a1e6
+palette = 14=#00b4e0
+palette = 15=#b3b692
+background = #0e101a
+foreground = #ebefc0
+cursor-color = #edf2c2
+cursor-text = #0e101a
+selection-background = #37382d
+selection-foreground = #ebefc0