init first unittest for workflowhub

.github/run_unittests.yaml

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+name: Run tests
+
+on:
+  pull_request:
+    branches:
+      - main
+    paths:
+      - 'bin/**'  # This will trigger the workflow only if files in the 'bin' folder are modified.
+
+jobs:
+  unittest:
+    runs-on: ubuntu-20.04
+    strategy:
+      matrix:
+        python-version: ['3.11']
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install requirements
+        run: python -m pip install -r requirements.txt
+      - name: Run unittests
+        run: |
+          PYTHONPATH=bin python -m unittest discover -s bin/tests

sources/bin/tests/readme.md

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+# Run the tests locally
+
+```
+cd codex/sources
+PYTHONPATH=bin python -m unittest discover -s bin/tests
+```