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/Material

@@ -0,0 +1,22 @@
+palette = 0=#212121
+palette = 1=#b7141f
+palette = 2=#457b24
+palette = 3=#f6981e
+palette = 4=#134eb2
+palette = 5=#560088
+palette = 6=#0e717c
+palette = 7=#afafaf
+palette = 8=#424242
+palette = 9=#e83b3f
+palette = 10=#7aba3a
+palette = 11=#bfaa00
+palette = 12=#54a4f3
+palette = 13=#aa4dbc
+palette = 14=#26bbd1
+palette = 15=#d9d9d9
+background = #eaeaea
+foreground = #232322
+cursor-color = #16afca
+cursor-text = #2e2e2d
+selection-background = #c2c2c2
+selection-foreground = #4e4e4e