regex improvements (tags)

[stepsal]

The current tags_regex is not parsing nested tags for me The proposed regex will also parse all tags from "sussudio.md" example without needing to modify the raw text beforehand. Would be a good improvement to move all the regexes into a constants.py file and load them from there.

Current regex: tags_regex=r'(?<!\()#{1}([A-z]+[0-9_\-]*[A-Z0-9]?)\/?'

Proposed Regex: tags_regex=r'(?<!\()(?<!\\)#{1}([A-z]+[0-9_\-]*[A-Z0-9]?[^\s]+(?![^\[\[]*\]\]))\/?'

[louis030195]

I also need this regex

[mfarragher]

Support for nested tags is covered now, in this version of dev branch (latest commit https://github.com/mfarragher/obsidiantools/commit/aff8605003b408db77970f2f6d20005de2cb5454 ).

I will also explore adding tag counts in future commits to that branch.