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/Teerb

@@ -0,0 +1,22 @@
+palette = 0=#1c1c1c
+palette = 1=#d68686
+palette = 2=#aed686
+palette = 3=#d7af87
+palette = 4=#86aed6
+palette = 5=#d6aed6
+palette = 6=#8adbb4
+palette = 7=#d0d0d0
+palette = 8=#4f4f4f
+palette = 9=#d68686
+palette = 10=#aed686
+palette = 11=#e4c9af
+palette = 12=#86aed6
+palette = 13=#d6aed6
+palette = 14=#b1e7dd
+palette = 15=#efefef
+background = #262626
+foreground = #d0d0d0
+cursor-color = #e4c9af
+cursor-text = #000000
+selection-background = #4d4d4d
+selection-foreground = #ffffff