chore(repo): add issue template and action docs generation

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a 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 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.
+
+**Please tell us about your environment:**
+
+  - Node Version: v0.0.0
+  - Protocol Version: 1
+  - Compiler version: v0.0.0
+  - VM Version: fate | fate2
+  - SDK Version: v0.0.0
+  - Python version: v3.7.0
+
+**Other information** (e.g. detailed explanation, stack traces, related issues, suggestions how to fix, links for us to have context, eg. forum, telegram, etc)

.github/ISSUE_TEMPLATE/feature_request.md

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

.github/workflows/docs-main.yml

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+name: Publish main docs
+on:
+  push:
+    branches: ['main']
+
+jobs:
+  main:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+      - uses: actions/setup-python@v2
+        with:
+          python-version: 3.8
+      - uses: actions/cache@v2
+        with:
+          path: ~/.cache/pip3
+          key: ${{ runner.os }}-pip-${{ hashFiles('docs/requirements.txt') }}
+      - run: pip3 install -r docs/requirements.txt
+      - run: git config --global user.email "github-action@users.noreply.github.com"
+      - run: git config --global user.name "GitHub Action"
+      - run: mike deploy --push main

.github/workflows/docs-release.yml

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+name: Publish release docs
+on:
+  release:
+    types: [released]
+
+jobs:
+  main:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+      - uses: actions/setup-python@v2
+        with:
+          python-version: 3.8
+      - uses: actions/cache@v2
+        with:
+          path: ~/.cache/pip3
+          key: ${{ runner.os }}-pip-${{ hashFiles('docs/requirements.txt') }}
+      - run: pip3 install -r docs/requirements.txt
+      - run: git config --global user.email "github-action@users.noreply.github.com"
+      - run: git config --global user.name "GitHub Action"
+      - run: echo "RELEASE_VERSION=${GITHUB_REF:10}" >> $GITHUB_ENV
+      - run: mike deploy --push --update-aliases $RELEASE_VERSION latest