Create issue templates for bugs and feature requests

[AbstractUmbra]

Description

This PR adds an issue templates for the "Bug" and "Feature Request" types to TwitchIO, with several validations requiring necessary information.

You can view these changes by accessing my fork and creating a new issue of either type.

These changes WILL need two new tags created for issues if they do not exist: "Unconfirmed Bug" and "Needs Verification".

Checklist

• If code changes were made then they have been tested.
  • I have updated the documentation to reflect the changes.
  • I have updated the changelog with a quick recap of my changes.
• This PR fixes an issue.
• This PR adds something new (e.g. new method or parameters).
• This PR is a breaking change (e.g. methods or parameters removed/renamed)
• This PR is not a code change (e.g. documentation, README, ...)
• I have read and agree to the Developer Certificate of Origin for this contribution