Add v3 issue template

Author: dearchap

.github/ISSUE_TEMPLATE/v3-bug-report.md

@@ -0,0 +1,75 @@
+---
+name: v3 bug report
+about: Create a report to help us fix v3 bugs
+title: 'your bug title goes here'
+labels: 'kind/bug, area/v3, status/triage'
+assignees: ''
+
+---
+
+## My urfave/cli version is
+
+_**( Put the version of urfave/cli that you are using here )**_
+
+## Checklist
+
+- [ ] Are you running the latest v3 release? The list of releases is [here](https://github.com/urfave/cli/releases).
+- [ ] Did you check the manual for your release? The v3 manual is [here](https://cli.urfave.org/v3/getting-started/)
+- [ ] Did you perform a search about this problem? Here's the [GitHub guide](https://help.github.com/en/github/managing-your-work-on-github/using-search-to-filter-issues-and-pull-requests) about searching.
+
+## Dependency Management
+
+<!--
+  Delete any of the following that do not apply:
+-->
+
+- My project is using go modules.
+- My project is using vendoring.
+- My project is automatically downloading the latest version.
+- I am unsure of what my dependency management setup is.
+
+## Describe the bug
+
+A clear and concise description of what the bug is.
+
+## To reproduce
+
+Describe the steps or code required to reproduce the behavior
+
+## Observed behavior
+
+What did you see happen immediately after the reproduction steps
+above?
+
+## Expected behavior
+
+What would you have expected to happen immediately after the
+reproduction steps above?
+
+## Additional context
+
+Add any other context about the problem here.
+
+If the issue relates to a specific open source GitHub repo, please
+link that repo here.
+
+If you can reproduce this issue with a public CI system, please
+link a failing build here.
+
+## Want to fix this yourself?
+
+We'd love to have more contributors on this project! If the fix for
+this bug is easily explained and very small, feel free to create a
+pull request for it.
+
+## Run `go version` and paste its output here
+
+```
+# paste `go version` output in here
+```
+
+## Run `go env` and paste its output here
+
+```
+# paste `go env` output in here
+```