chore: review by @Quorafind in https://github.com/Quorafind/Obsidian-Fold-Anywhere/pull/9
chore: review by @Quorafind in https://github.com/Quorafind/Obsidian-Fold-Anywhere/pull/10
Support custom line marker. Resolved #11
Full Changelog: https://github.com/Quorafind/Obsidian-Fold-Anywhere/compare/1.2.1…1.3.0