chore(git): ignore manual release script in git

- Added scripts/manual-release.sh to .gitignore
- Prevent tracking of manual release script files in repository

Author: umwelt

.gitignore

@@ -12,3 +12,5 @@ coverage/
 *.swp
 *.swo
 .claude-memory.md
+scripts/manual-release.sh
+scripts/manual-release.sh