chore: Add github templates

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a bug 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 that can be taken to reproduce the behaviour -->
+
+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. -->
+
+#### Logs
+<!-- If applicable, add logs to help explain your problem. -->
+
+#### Environment
+
+- Snap revision: <!-- e.g. 2182 -->
+- Snap channel: <!-- e.g. 1.15/stable -->
+- Vault version: <!-- e.g. 1.15.4 -->
+- Ubuntu version: <!-- e.g. 22.04 -->
+
+#### Additional context
+
+<!-- Add any other context about the problem here. -->

.github/pull_request_template.md

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+# Description
+
+Please include a summary of the change. Please also include relevant motivation and context. List any dependencies that are required for this change.
+
+# Checklist:
+
+- [ ] My code follows the [style guidelines](/CONTRIBUTING.md) of this project
+- [ ] I have performed a self-review of my own code
+- [ ] I have made corresponding changes to the documentation
+- [ ] I have added tests that validate the behaviour of the software
+- [ ] I validated that new and existing unit tests pass locally with my changes
+- [ ] Any dependent changes have been merged and published in downstream modules

CONTRIBUTING.md

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+# Contributing
+
+Install snapcraft:
+
+```bash
+sudo snap install snapcraft --classic
+```
+
+Build the snap:
+
+```bash
+snapcraft pack --verbose
+```