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: ''
+assignees: PenguinBoi12
+type: Bug
+
+---
+
+**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.
+
+**Additional context**
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/feature--good-first.md

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+---
+name: 'Feature: Good First'
+about: 'This template is for good first issues '
+title: ''
+labels: good first issue
+assignees: ''
+type: Feature
+
+---
+
+Explain clearly what we want to add and why it's useful to add it. Give context when necessary.
+
+### Proposed API
+This is a proposed API. It does not necessarily mean it's the final API but it's a good place to start.
+
+```python
+Some code here
+```
+
+**Example**
+```python
+An example of usage of the feature
+```
+
+### Before opening a PR
+- Write unit tests
+- Run `mypy matrix/`
+- Run `pytest tests/`
+- Run `black .`

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: ''
+assignees: ''
+type: Feature
+
+---
+
+**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.