Tag counters

[ghost]

Is your feature request related to a problem? Please describe.
No

Describe the solution you'd like
To be able to view a the number of tokens associated with each tag in the tags drawer, such as putting the count in parenthesis in the list of tags e.g. "Some Tag (4)"

Describe alternatives you've considered
None

Additional context
I made a test implementation on my own branch here: https://github.com/ian-collier-osu/andOTP/tree/a4. However I'm not sure creating a new object for Tags is the best way to work around having no tag database entity.