refactor(home): move scripts/ out into its own repo

scripts/ now lives in git@dev.pivoine.art:valknar/scripts.git.
Remove it from the home repo tracking and stop allowlisting it
in .gitignore.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitignore

@@ -19,6 +19,3 @@
 !signature.txt
 !LICENSE
 !README.md
-
-!scripts/
-!scripts/**/*