Add a new issue template for packages (#1278)

## Summary
Add a new issue template for packages

## How was it tested?
N/A

Author: loreto

.github/ISSUE_TEMPLATE/package-issue.md

@@ -0,0 +1,18 @@
+---
+name: Package Issue Report
+about: Request a new package or report a problem with an existing package on either Devbox or Nixhub
+title: "[Package Issue Report]: <Package Name>"
+labels: package issue
+assignees: Lagoja
+---
+**Are you requesting a new package or reporting an issue on an existing one?**
+
+**If reporting an issue on an existing one, what is the name of the package?**
+Please use the name as it appears in https://www.nixhub.io 
+
+**What changes are you requesting?**
+Summarize your request. If it's for an existing package that is not
+working as expectd, provide a concise explanation of what is going wrong.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.