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/Pnevma

@@ -0,0 +1,22 @@
+palette = 0=#2f2e2d
+palette = 1=#a36666
+palette = 2=#90a57d
+palette = 3=#d7af87
+palette = 4=#7fa5bd
+palette = 5=#c79ec4
+palette = 6=#8adbb4
+palette = 7=#d0d0d0
+palette = 8=#4a4845
+palette = 9=#d78787
+palette = 10=#afbea2
+palette = 11=#e4c9af
+palette = 12=#a1bdce
+palette = 13=#d7beda
+palette = 14=#b1e7dd
+palette = 15=#efefef
+background = #1c1c1c
+foreground = #d0d0d0
+cursor-color = #e4c9af
+cursor-text = #000000
+selection-background = #4d4d4d
+selection-foreground = #ffffff