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/Flexoki Light

@@ -0,0 +1,22 @@
+palette = 0=#100f0f
+palette = 1=#af3029
+palette = 2=#66800b
+palette = 3=#ad8301
+palette = 4=#205ea6
+palette = 5=#a02f6f
+palette = 6=#24837b
+palette = 7=#6f6e69
+palette = 8=#b7b5ac
+palette = 9=#d14d41
+palette = 10=#879a39
+palette = 11=#d0a215
+palette = 12=#4385be
+palette = 13=#ce5d97
+palette = 14=#3aa99f
+palette = 15=#cecdc3
+background = #fffcf0
+foreground = #100f0f
+cursor-color = #100f0f
+cursor-text = #fffcf0
+selection-background = #cecdc3
+selection-foreground = #100f0f