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/Srcery

@@ -0,0 +1,22 @@
+palette = 0=#1c1b19
+palette = 1=#ef2f27
+palette = 2=#519f50
+palette = 3=#fbb829
+palette = 4=#2c78bf
+palette = 5=#e02c6d
+palette = 6=#0aaeb3
+palette = 7=#baa67f
+palette = 8=#918175
+palette = 9=#f75341
+palette = 10=#98bc37
+palette = 11=#fed06e
+palette = 12=#68a8e4
+palette = 13=#ff5c8f
+palette = 14=#2be4d0
+palette = 15=#fce8c3
+background = #1c1b19
+foreground = #fce8c3
+cursor-color = #fbb829
+cursor-text = #1c1b19
+selection-background = #fce8c3
+selection-foreground = #1c1b19