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/Shaman

@@ -0,0 +1,22 @@
+palette = 0=#012026
+palette = 1=#b2302d
+palette = 2=#00a941
+palette = 3=#5e8baa
+palette = 4=#449a86
+palette = 5=#00599d
+palette = 6=#5d7e19
+palette = 7=#405555
+palette = 8=#384451
+palette = 9=#ff4242
+palette = 10=#2aea5e
+palette = 11=#8ed4fd
+palette = 12=#61d5ba
+palette = 13=#1298ff
+palette = 14=#98d028
+palette = 15=#58fbd6
+background = #001015
+foreground = #405555
+cursor-color = #4afcd6
+cursor-text = #031413
+selection-background = #415555
+selection-foreground = #5afad6