needs-triage
ISSUE_TEMPLATE
as can be seen [here](https://github.com/nushell/nushell/labels?q=needs-), i've created the `needs-triage` and `needs-core-team-attention` labels. in this PR, i made the `needs-triage` a default label to all the issue templates 😋
Wanted to start to have a stdlib issue template. I know this is rough but it's something to start with.