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/Thayer Bright

@@ -0,0 +1,22 @@
+palette = 0=#1b1d1e
+palette = 1=#f92672
+palette = 2=#4df840
+palette = 3=#f4fd22
+palette = 4=#2757d6
+palette = 5=#8c54fe
+palette = 6=#38c8b5
+palette = 7=#ccccc6
+palette = 8=#505354
+palette = 9=#ff5995
+palette = 10=#b6e354
+palette = 11=#feed6c
+palette = 12=#3f78ff
+palette = 13=#9e6ffe
+palette = 14=#23cfd5
+palette = 15=#f8f8f2
+background = #1b1d1e
+foreground = #f8f8f8
+cursor-color = #fc971f
+cursor-text = #000000
+selection-background = #4d4d4d
+selection-foreground = #ffffff