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/Selenized Light

@@ -0,0 +1,22 @@
+palette = 0=#ece3cc
+palette = 1=#d2212d
+palette = 2=#489100
+palette = 3=#ad8900
+palette = 4=#0072d4
+palette = 5=#ca4898
+palette = 6=#009c8f
+palette = 7=#53676d
+palette = 8=#909995
+palette = 9=#cc1729
+palette = 10=#428b00
+palette = 11=#a78300
+palette = 12=#006dce
+palette = 13=#c44392
+palette = 14=#00978a
+palette = 15=#3a4d53
+background = #fbf3db
+foreground = #53676d
+cursor-color = #53676d
+cursor-text = #fbf3db
+selection-background = #ece3cc
+selection-foreground = #00978a