Request to create a GH issue template for people to report backtracking

.github/ISSUE_TEMPLATE/backtrack-report.md

@@ -0,0 +1,42 @@
+---
+name: pip backtrack report
+about: This template is for users who experience pip backtracking.
+labels: ["K: UX", "C: new resolver", "C: dependency resolution"]
+---
+
+**Description**
+With the release of the new resolver, pip is now more strict in the package versions it installs.
+
+To communicate to users when (and why) pip backtracks, we've included [an INFO message during this backtracking](https://github.com/pypa/pip/issues/8975) in pip's output.
+
+In this INFO message we ask users to file an issue about what packages pip backtracks on, how many times it occurs.
+
+We'd appreciate if you answer these questions for us.
+
+**Environment**
+
+* pip version:
+* Python version:
+* OS:
+
+<!-- Feel free to add more information about your environment here -->
+
+**Description**
+<!-- A short and concise description of why this backtracking occurred. -->
+
+**How to Reproduce**
+<!-- Describe the steps to reproduce this backtracking. -->
+
+1. Get package from '...'
+2. Then run '...'
+3. Then backtracking occurs for `package-name` and `another-package-name`, etc.
+
+**Output**
+<!-- ``Most helpful is output that shows:
+- what package you are installing when pip backtracks
+- the multiple versions of packages that pip tries to install
+- how many times does pip download those packages -->
+
+```
+Paste the output of the steps above, including the commands themselves etc.
+```