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/Elementary

@@ -0,0 +1,22 @@
+palette = 0=#242424
+palette = 1=#d71c15
+palette = 2=#5aa513
+palette = 3=#fdb40c
+palette = 4=#134899
+palette = 5=#e40038
+palette = 6=#2595e1
+palette = 7=#efefef
+palette = 8=#4b4b4b
+palette = 9=#fc1c18
+palette = 10=#6bc219
+palette = 11=#fec80e
+palette = 12=#0955ff
+palette = 13=#fb0050
+palette = 14=#3ea8fc
+palette = 15=#8c00ec
+background = #181818
+foreground = #efefef
+cursor-color = #bbbbbb
+cursor-text = #ffffff
+selection-background = #b5d5ff
+selection-foreground = #000000