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/Oceanic Material

@@ -0,0 +1,22 @@
+palette = 0=#000000
+palette = 1=#ee2b2a
+palette = 2=#40a33f
+palette = 3=#ffea2e
+palette = 4=#1e80f0
+palette = 5=#8800a0
+palette = 6=#16afca
+palette = 7=#a4a4a4
+palette = 8=#777777
+palette = 9=#dc5c60
+palette = 10=#70be71
+palette = 11=#fff163
+palette = 12=#54a4f3
+palette = 13=#aa4dbc
+palette = 14=#42c7da
+palette = 15=#ffffff
+background = #1c262b
+foreground = #c2c8d7
+cursor-color = #b3b8c3
+cursor-text = #ffffff
+selection-background = #6dc2b8
+selection-foreground = #e8eefd