Improved issue templates

[CodyCBakerPhD]

Motivation

GitHub is improving their support for advanced issue templates; these new ones appear and behave more like abbreviated forms, which makes it much easier for users and developers to communicate the minimal amount of information directed to their current needs. It also allows us to include tidbits of extra information (like nicer external links) to direct them in their search for answers.

You can view previews of the forms (minus the GitHub encoding header) by viewing the raw files through the web GUI: bug report, feature request, and documentation

Some examples particular to the NWBInspector and their outputs here: https://github.com/catalystneuro/nwbinspector/issues

Checklist

• Did you update CHANGELOG.md with your changes?
• Have you checked our Contributing document?
• Have you ensured the PR clearly describes the problem and the solution?
• Is your contribution compliant with our coding style? This can be checked running flake8 from the source directory.
• Have you checked to ensure that there aren't other open Pull Requests for the same change?
• Have you included the relevant issue number using "Fix #XXX" notation where XXX is the issue number? By including "Fix #XXX" you allow GitHub to close issue #XXX when the PR is merged.

[rly]

@CodyCBakerPhD is this ready for review?

[rly]

Looks great! Thank you

[CodyCBakerPhD]

@rly Yep, entirely up to you if you want to make any format changes, etc. Just leaving a similar skeleton here to what is currently on the Inspector and CT