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/N0Tch2K

@@ -0,0 +1,22 @@
+palette = 0=#383838
+palette = 1=#a95551
+palette = 2=#666666
+palette = 3=#a98051
+palette = 4=#657d3e
+palette = 5=#767676
+palette = 6=#c9c9c9
+palette = 7=#d0b8a3
+palette = 8=#545454
+palette = 9=#a97775
+palette = 10=#8c8c8c
+palette = 11=#a99175
+palette = 12=#98bd5e
+palette = 13=#a3a3a3
+palette = 14=#dcdcdc
+palette = 15=#d8c8bb
+background = #222222
+foreground = #a0a0a0
+cursor-color = #aa9175
+cursor-text = #000000
+selection-background = #4d4d4d
+selection-foreground = #ffffff