chore: add PR and issue templates

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a bug report to help us improve
+labels: "bug"
+---
+
+**Describe the bug**
+
+<!-- A clear and concise description of what the bug is. -->
+
+**To Reproduce**
+
+Steps to reproduce the behavior:
+
+1. ...
+2. ...
+3. ...
+
+**Expected behavior**
+
+<!-- A clear and concise description of what you expected to happen. -->
+
+**System [please complete the following information]:**
+
+-   OS: e.g. [Ubuntu 18.04]
+-   Python Version: [e.g. Python 3.8]
+-   PySpark version: [e.g. PySpark 3.5.1]
+
+**Additional context**
+
+<!-- Add any other context about the problem here. -->
+
+**Are you planning on creating a PR?**
+
+<!-- Check the box below with an `x` if you are planning to create a PR for this. -->
+
+- [ ] I'm planning to make a pull-request

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest a new feature
+labels: "enhancement"
+---
+
+**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 would like**
+
+<!-- A clear and concise description of what you want to happen. -->
+
+**Additional context**
+
+<!-- Add any other context or screenshots about the feature request here. -->
+
+**Are you planning on creating a PR?**
+
+<!-- Check the box below with an `x` if you are planning to create a PR for this. -->
+
+- [ ] I'm planning to make a pull-request

.github/pull_request_template.md

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+**PR Checklist**
+
+- [ ] A description of the changes is added to the description of this PR.
+- [ ] If there is a related issue, make sure it is linked to this PR.
+- [ ] If you've fixed a bug or added code that should be tested, add tests!
+- [ ] If you've added or modified a feature, documentation in `docs` is updated
+
+**Description of changes**
+
+<!-- Please state what you've changed and how it might affect the users. -->