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/Farmhouse Dark

@@ -0,0 +1,22 @@
+palette = 0=#1d2027
+palette = 1=#ba0004
+palette = 2=#549d00
+palette = 3=#c87300
+palette = 4=#0049e6
+palette = 5=#9f1b61
+palette = 6=#1fb65c
+palette = 7=#e8e4e1
+palette = 8=#464d54
+palette = 9=#eb0009
+palette = 10=#7ac100
+palette = 11=#ea9a00
+palette = 12=#006efe
+palette = 13=#bf3b7f
+palette = 14=#19e062
+palette = 15=#f4eef0
+background = #1d2027
+foreground = #e8e4e1
+cursor-color = #006efe
+cursor-text = #e8e4e1
+selection-background = #4d5658
+selection-foreground = #b3b1aa