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/Birds Of Paradise

@@ -0,0 +1,22 @@
+palette = 0=#573d26
+palette = 1=#be2d26
+palette = 2=#6ba18a
+palette = 3=#e99d2a
+palette = 4=#5a86ad
+palette = 5=#ac80a6
+palette = 6=#74a6ad
+palette = 7=#e0dbb7
+palette = 8=#9b6c4a
+palette = 9=#e84627
+palette = 10=#95d8ba
+palette = 11=#d0d150
+palette = 12=#b8d3ed
+palette = 13=#d19ecb
+palette = 14=#93cfd7
+palette = 15=#fff9d5
+background = #2a1f1d
+foreground = #e0dbb7
+cursor-color = #644a33
+cursor-text = #8a7059
+selection-background = #563c27
+selection-foreground = #e0dbbb