Issue templates missing

[bmarwell]

We need an issue template now that we have GitHub issues open.
This could get us started:
https://gist.github.com/bjankord/0db8add11881ba4ba8003ece82561f76

We should include

• here is not the place to report security issues
• expected / actual behaviour (if it is a bug)
• ...?

[fpapon]

We have this in another ASF project:

https://github.com/apache/eventmesh/tree/master/.github/ISSUE_TEMPLATE

I think we can reuse it

[EdgarRamirezFuentes]

Hi! 😄
I'm new in this world of Open Source contributions, and I think this could be my good first issue.
May I help you adding the issue templates for this project?

[lprimak]

Sure! All help is appreciated

[EdgarRamirezFuentes]

Thanks!
I added new issue templates based on the eventmesh templates mentioned before.
I did not add the unit testing template because I did not find any info about it in the website.