[enhancement] Use Obsidian indentation settings when create lists in markdown

[dekhanov]

Sometimes I need to edit a diagram in markdown mode. Because Markmind uses its own indentation rules lists created in markdown mode are not aligned with lists created in outline mode. This produces bugs when switching back to outline mode. I believe the plugin should use Obsidian indentation settings, such as tabs or spaces and tab size.

[simonhsu]

really need this feature, too ! BTW, great plugin ! Thanks author & all the contributors