ci: add basic linting CI

This simply runs mypy and flake8 on all of the python scripts, but that
should be enough for now.

Signed-off-by: Daniil Tatianin <[email protected]>

.github/workflows/main.yml

@@ -2,6 +2,29 @@ name: CI
 on: [push, pull_request]
 
 jobs:
+  lint-python-scripts:
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: true
+
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          submodules: true
+
+      - name: Install flake8 & mypy
+        run: |
+          sudo apt update
+          sudo apt install python3 python3-pip
+          pip install flake8 mypy
+
+      - name: Run flake8 on the project
+        run: flake8 *.py scripts/*.py
+
+      - name: Run mypy on the project
+        run: mypy --disallow-incomplete-defs --no-implicit-optional *.py scripts/*.py
+
   build:
     runs-on: ${{ matrix.os }}