tag-search command to search tags via their contents instead of names.

[CharlieADavies]

Currently, it can be difficult to find the specific command for a tag even if you know it exists. A command to allow you to search through tag bodies would help with finding the right tags. For example doing !tag-search backtick would return !code-block (and any other tags that include the word backtick).

[ikuyarihS]

This is an interesting idea, and this is very feasible since we already fetch all tags into a dictionary of Dict[str, str] for tag['title'].lower(): tag - and so we can make a command to search on the contents of the tag instead of just purely the name of the tag ( incase we forgot the name! )

[ikuyarihS]

I will be working on this!