Support hierarchical tags

[Jarartur]

What would you like to be added?

For now a tag like: #tag/subtag will get parsed as #tag, and the /subtag will be left as text. Also there is no possibility to assign a color to such a tag, only to the first part.

A simple fix would be to support special characters like / in tags, so that only whitespace would end the tag.

Why is this needed?

Obsidian supports nested tags so it would be useful to use them in markwhen.

My use case is different projects management, where I categorize my projects hierarchically, e.g., #projects/main-project/sub-project-1