add: ci test

Author: TOsmanov

.github/workflows/python-test.yml

@@ -0,0 +1,29 @@
+name: Python package
+
+on: [push]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ["3.8", "3.9"]
+
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v3
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip3 install .
+          pip3 install --upgrade foliantcontrib.test_framework
+      - name: Test with unittest
+        run: |
+          python3 -m doctest docs/*.md &&\
+            python3 -m unittest discover -v &&\
+            mypy ./foliant/ --ignore-missing-imports &&\
+            cd test_pext && python3 -m unittest test_preprocessor_ext.py