first stab at template for analysis proposal

.github/ISSUE_TEMPLATE/propose-an-analysis.md

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+---
+name: Propose an analysis
+about: Use this issue template to propose a new or modified analysis
+title: 'Analysis:'
+labels: analysis
+---
+
+<!-- This issue template should be used to propose a new analysis module, or propose to modify an existing analysis module.
+Filing this issue is the SECOND STEP to proposing analyses after discussing this idea on GitHub Discussions.
+
+If you have not yet had a discussion about this analysis, please instead file a Discussion here: https://github.com/AlexsLemonade/OpenScPCA-analysis/discussions/.
+TODO: Insert docs link about how to do this? ^^
+
+You can use the conclusions from your discussion to help answer the questions in this issue template.
+-->
+
+#### Please link to the GitHub Discussion for this proposed analysis.
+
+<!-- Copy/paste the link to the GitHub Discussion you have previously had about this analysis. -->
+
+
+#### Will this analysis be a new analysis module, or will you be modifying an existing analysis module?
+
+<!-- If you will be modifying an existing module, please include its name here. -->
+
+
+### Describe the scientific goals of this analysis.
+
+
+### Describe the approach for this analysis in each subsection:
+
+
+#### What method or approach will be used?
+
+
+#### What computational resources will be required?
+
+
+#### What input data are required?
+
+
+### What is the anticipated timeline to complete this analysis?
+
+
+### Additional action items:
+
+<!-- Please take the following steps and check them off when completed -->
+
+- [ ] Assign this issue to the contributor(s) who will perform the analysis
+- [ ] Add the relevant label to this issue, either `new-analysis` or `modified-analysis`