ga: add mypy workflow

.github/workflows/mypy.yml

@@ -0,0 +1,25 @@
+name: MyPy Type Checking
+
+on: [push]
+
+jobs:
+  type-check:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.11'
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install mypy types-requests types-setuptools
+          pip install -r requirements_dev.txt
+
+      - name: Run MyPy
+        run: mypy .