Add black lint & workflow reorganization

.github/workflows/lint.yml

@@ -0,0 +1,51 @@
+name: lint
+
+on:
+  push:
+  pull_request:
+    types: [ opened, edited ]
+
+jobs:
+  check:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: [ '3.8', '3.x' ]
+
+    name: check ${{ matrix.python-version }}
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - name: Set up CPython ${{ matrix.python-version }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Install dependencies
+        id: install-deps
+        run: |
+          python -m pip install --upgrade pip setuptools wheel black
+          pip install -U -r requirements.txt
+
+      - name: Setup node.js
+        uses: actions/setup-node@v2
+        with:
+          node-version: '16'
+
+      - name: Install pyright
+        run: |
+          npm install -g pyright
+
+      - name: Run pyright
+        run: |
+          # It is OK for the types to not pass at this stage
+          # We are just running it as a quick reference check
+          pyright || echo "Type checking did not pass"
+
+      - name: Run black
+        if: ${{ always() && steps.install-deps.outcome == 'success' }}
+        run: |
+          black --check --verbose discord