[chore] added issue and pull request templates

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve WG-Portal
+labels: bug
+
+---
+<!-- Tip: you can use code blocks
+for better better formatting of yaml config or logs
+
+```yaml
+# config.yaml
+```
+
+```console
+logs here
+``` -->
+
+**Describe the bug**
+<!-- A clear and concise description of what the bug is. -->
+
+**Expected behavior**
+<!-- A clear and concise description of what you expected to happen. -->
+
+**Steps to reproduce**
+<!--Steps to reproduce the bug should be clear and easily reproducible to help people
+gain an understanding of the problem.-->
+
+**Screenshots**
+<!-- If applicable, add screenshots to help explain your problem. -->
+
+**Additional context**
+<!-- Add any other context about the problem here. -->
+- Application version: v
+- Install method: binary/docker/helm/sources
+<!-- - OS:  -->

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest an idea for this project
+labels: 'enhancement'
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+<!-- A clear and concise description of what the problem is. -->
+
+**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. -->

.github/pull_request_template.md

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+## Problem Statement
+
+What is the problem you're trying to solve?
+
+## Related Issue
+
+Fixes #...
+
+## Proposed Changes
+
+How do you like to solve the issue and why?
+
+## Checklist
+
+- [ ] Commits are signed with `git commit --signoff`
+- [ ] Changes have reasonable test coverage
+- [ ] Tests pass with `make test`
+- [ ] Helm docs are up-to-date with `make helm-docs`