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/Pale Night Hc

@@ -0,0 +1,22 @@
+palette = 0=#000000
+palette = 1=#f07178
+palette = 2=#c3e88d
+palette = 3=#ffcb6b
+palette = 4=#82aaff
+palette = 5=#c792ea
+palette = 6=#89ddff
+palette = 7=#ffffff
+palette = 8=#737373
+palette = 9=#f6a9ae
+palette = 10=#dbf1ba
+palette = 11=#ffdfa6
+palette = 12=#b4ccff
+palette = 13=#ddbdf2
+palette = 14=#b8eaff
+palette = 15=#999999
+background = #3e4251
+foreground = #cccccc
+cursor-color = #ffcb6b
+cursor-text = #323232
+selection-background = #717cb4
+selection-foreground = #80cbc4