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/Aizen Light

@@ -0,0 +1,22 @@
+palette = 0=#f0f2f6
+palette = 1=#d00c36
+palette = 2=#3e9e28
+palette = 3=#dd8c1a
+palette = 4=#1c64f2
+palette = 5=#8636ec
+palette = 6=#159096
+palette = 7=#4a4d66
+palette = 8=#adb2bc
+palette = 9=#d00c36
+palette = 10=#3e9e28
+palette = 11=#dd8c1a
+palette = 12=#1c64f2
+palette = 13=#8636ec
+palette = 14=#159096
+palette = 15=#4a4d66
+background = #f0f2f6
+foreground = #4a4d66
+cursor-color = #fc6008
+cursor-text = #f0f2f6
+selection-background = #bdc2cc
+selection-foreground = #4a4d66