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/Mona Lisa

@@ -0,0 +1,22 @@
+palette = 0=#351b0e
+palette = 1=#9b291c
+palette = 2=#636232
+palette = 3=#c36e28
+palette = 4=#515c5d
+palette = 5=#9b1d29
+palette = 6=#588056
+palette = 7=#f7d75c
+palette = 8=#874228
+palette = 9=#ff4331
+palette = 10=#b4b264
+palette = 11=#ff9566
+palette = 12=#9eb2b4
+palette = 13=#ff5b6a
+palette = 14=#8acd8f
+palette = 15=#ffe598
+background = #120b0d
+foreground = #f7d66a
+cursor-color = #c46c32
+cursor-text = #120b0d
+selection-background = #f7d66a
+selection-foreground = #120b0d