Gitignore docs/wiki/ (#10)

docs/wiki/ is a checkout of quartermaster.wiki.git, not part of the
main repo. Ignoring it keeps git status clean and prevents accidental
cross-repo commits.

Refs #9

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.gitignore

@@ -66,6 +66,7 @@ quartermaster.db-journal
 *.sqlite
 *.sqlite3
 backups/
+docs/wiki/
 
 # Flask stuff:
 instance/