Create workflow contribution issue template

.github/ISSUE_TEMPLATE/workflow_contribution

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+Thanks for contributing a workflow to CoastSeg! Please read and follow these instructions carefully, then delete this introductory text to keep your issue easy to read. Feel free to keep the titles described here to ensure our team can easily understand your issue. Note that the issue tracker is NOT the place for usage questions and technical assistance.
+
+A guide on how to submit a workflow can be found in the wiki :[Contribution Guide]( https://github.com/Doodleverse/CoastSeg/wiki/13.-%5BADVANCED%5D-Contribution-Guide/_edit#contributing-workflows:~:text=Contributing%20Workflows)
+## Describe the New Workflow
+A clear and concise description of what the bug is.
+
+## Notebook & Code
+1. Enter the name of your notebook here
+- Example: `SDS_new_workflow_name.ipynb` in CoastSeg 
+2. Enter the name of were the python file containing the code for your workflow to run.
+- If all the code for your workflow is in the notebook, then state that here.
+- Example: Create `new_workflow_name.py` which contains all the code for your workflow
+
+## Steps To Run this Workflow
+Steps to reproduce the behavior:
+1. Go to '...'
+2. Click on '....'
+3. Scroll down to '....'
+
+## Expected behavior
+A clear and concise description of what you expected to happen.
+
+## Screenshots
+If applicable, add screenshots to show what your worklow
+
+
+
+### **Additional context**
+Add any other context about the your workflow.