Add an an option to exclude some unwanted file extensions

[kwaun]

I have some *.dat files and others on my vault and Zoottelkeeper indexes them. I really need those files but I don't want them indexed by Zoottelkeeper because Obsidian cannot handle them. It would be great to have an option to exclude some extensions or maybe to index the *.md files only and ignore the rest. Same as the included/excluded folders option.