Add templates

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: "🐛 Bug Report"
+about: Report a reproducible bug or regression.
+title: 'Bug: '
+labels: 'bug'
+
+---
+
+<!--
+  Please provide a clear and concise description of what the bug is. Include
+  screenshots if needed. Please test using the latest version of the relevant
+  React packages to make sure your issue has not already been fixed.
+-->
+
+Application version:
+
+## Steps To Reproduce
+
+1.
+2.
+
+<!--
+  Your bug will get fixed much faster if we can run your code and it doesn't
+  have dependencies other than React. Issues without reproduction steps or
+  code examples may be immediately closed as not actionable.
+-->
+
+Link to code example:
+
+<!--
+  Please provide a CodeSandbox (https://codesandbox.io/s/new), a link to a
+  repository on GitHub, or provide a minimal code example that reproduces the
+  problem. You may provide a screenshot of the application if you think it is
+  relevant to your bug report. Here are some tips for providing a minimal
+  example: https://stackoverflow.com/help/mcve.
+-->
+
+## The current behavior
+
+
+## The expected behavior

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: 🛠 Feature request
+about: If you have a feature request for the Nexus, file it here.
+labels: 'type: enhancement'
+---
+
+**Feature description**
+Clearly and concisely describe the feature.
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.

.github/PULL_REQUEST_TEMPLATE/bug_template.yml

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+## Bug description
+Clearly and concisely describe the problem.
+
+## Solution description
+Describe your code changes in detail for reviewers. Explain the technical solution you have provided and how it fixes the issue case.
+
+## Covered unit test cases
+- [x] yes
+- [x] no

.github/PULL_REQUEST_TEMPLATE/feature_template.yml

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+## Feature description
+Clearly and concisely describe the feature.
+
+## Solution description
+Describe your code changes in detail for reviewers.
+
+## Areas affected and ensured
+List out the areas affected by your code changes.
+
+## Covered unit test cases
+- [x] yes
+- [x] no