Add possibility to exclude tags beginning with '+' from list

[Dimentium]

I add my org-mode folder as external folder and thats fine, but now I have some irrelevant tags in list :(

Root cause: org-mode uses hash for meta-info like this: #+startup: showall #+BEGIN_SRC markdown

Suggestion: It would be nice to have possibility to exclude some tags from tag list. May be with regex, or a plain list, or just exclude tags beginning with +.

May be it is possible to add + to punctuations excludes here, or make it optional. https://github.com/glushchenko/fsnotes/blob/7d1cb5fb651eeb33d92563c2ca5cd3c9d8037be3/FSNotes/Helpers/NotesTextProcessor.swift#L1335-L1346