Add workflows and issue templates

Author: rbaltrusch

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: ''
+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.
+
+**Desktop (please complete the following information):**
+ - OS: [e.g. iOS]
+ - Version or commit hash [e.g. 22]
+
+**Additional context**
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: ''
+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/pull_request_template.md

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+---
+name: Pull request
+about: Submitting a pull request
+title: ''
+labels: ''
+assignees: ''
+reviewers: ''
+
+---
+
+- Make sure all tests (including pylint) pass before submitting your pull request.
+- Make sure all Github Actions workflows that were passing before your changes are still passing.
+- Reference the issue that this pull request is fixing.
+- (Optionally) mention any people involved in the discussion of the issue.
+- Document how your pull request fixes the issue.
+- Document any alternatives you considered and why they were not chosen.
+- Document any shortcomings, todos or open-points.

.github/workflows/pylint.yml

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+name: Pylint
+
+on: [push]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ["3.8", "3.9"]
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v2
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install pylint
+        pip install -r projects/snake/requirements.txt
+    - name: Analysing the code with pylint
+      working-directory: projects
+      run: |
+        # run pylint on all python files in the projects dir
+        pylint -d=import-error --fail-under=9.75 $(git ls-files '*.py')