Add issue templates (#632)

* Add issue templates

* adds support request template

---------

Co-authored-by: Tom Smith <tomsmith@tss38-im.local>

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,25 @@
+---
+name: Bug report
+about: Create a bug report to help us improve
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Steps to reproduce the behavior. If possible, include example data. At the very least, explain what the input data was and provide the `umi_tools` command used.
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Environment**
+ - OS: [e.g. iOS]
+ - UMI-tools version [e.g. 1.1.3]
+ - How was UMI-tools installed (e.g pip/conda etc)
+
+**Additional context**
+Add any other context about the problem here. Was UMI-tools being run within another pipeline, etc.

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,22 @@
+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Is this something you propose to solve/implement, or is this a request?**
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. 
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered or have implemented. What are the limitations of this approach compared to what you are requesting/implementing?
+
+**Additional context**
+Add any other context or screenshots about the feature request here.

.github/ISSUE_TEMPLATE/support_request.md

@@ -0,0 +1,24 @@
+---
+name: Support request
+about: Help with running UMI-tools
+title: ''
+labels: ''
+assignees: ''
+
+---
+:warning: :warning: :warning:
+**Often you can get help more quickly from existing online material. Before you raise an issue to request help with running UMI-tools, please refer to:**
+
+- [Frequently asked questions](https://umi-tools.readthedocs.io/en/latest/faq.html)
+- [Documentation](https://umi-tools.readthedocs.io/en/latest/)
+- Search within the existing [open/closed issues](https://github.com/CGATOxford/UMI-tools/issues?q=is%3Aissue)
+- [Biostars](https://www.biostars.org/post/search/?query=umi_tools) 
+- Web search engine
+
+
+If the above links don't provide the information/advice required, please consider posting on [Biostars](https://www.biostars.org/new/post/). You're likely to get a response just as quick and your question will be visible to a larger community who can help and/or benefit from the post
+
+If you believe the support request is best made via a github issue, please delete this text and go ahead :smile:
+
+
+