Update issue templates

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: bug
+assignees: ''
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Steps to reproduce the behavior:
+1. Go to '...'
+2. Click on '....'
+3. Scroll down to '....'
+4. See error
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Screenshots**
+If applicable, add screenshots to help explain your problem.
+
+**Environment (please complete the following information):**
+ - OS: [e.g. Debian]
+ - Python: [e.g. 3.9.1]
+ - HSF Version: [e.g. 0.1.1]
+ - Relevant settings: [e.g. segmentation=bagging_fast]
+
+**Additional context**
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/data-submission.md

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+---
+name: Data Submission
+about: Help us improve our models by sending us your data or suggesting us new datasets.
+title: ''
+labels: enhancement
+assignees: ''
+
+---
+
+Please be aware that your private data will stay private. We understand privacy issues, and HSF will NOT release any dataset on its own. Your MRIs will stay private, securely stored in specific storage infrastructures inaccessible from the Internet at the Commissariat à l'Energie Atomique et aux Energies Alternatives (CEA) of Paris-Saclay, France. Your MRIs will ONLY be used for offline training of our Deep Learning models.
+
+**Do you open this issue because of an issue in HSF? Please describe.**
+A clear and concise description of what the problem is with HSF leading you to gather new segmented MRIs (e.g. bad segmentation in pathological subjects).
+
+**Is the dataset yours? How to cite it?**
+A clear and concise description of where does the data comes from, and the conditions to use the MRIs.
+
+**Dataset description**
+A clear and concise description of any included MRI (e.g. 71 T1w MRIs, MP2RAGE, 0.8*0.8*0.8mm) with manually corrected segmentations (HSF bagging accurate as base).
+
+**How to access the dataset?**
+Please provide a link if the dataset is public, or provide a way to discuss this in private if the dataset has to stay private.

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: enhancement, help wanted
+assignees: ''
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**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.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.