chore: add dependabot configuration for weekly updates on pip and GitHub Actions

ci: create GitHub Actions workflow for testing with Python 3.11 and linting tools

Author: tumf

.github/dependabot.yml

@@ -0,0 +1,13 @@
+version: 2
+updates:
+  - package-ecosystem: "pip"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    open-pull-requests-limit: 10
+    
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    open-pull-requests-limit: 10

.github/workflows/test.yml

@@ -0,0 +1,43 @@
+name: Test
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ["3.11"]
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v5
+      with:
+        python-version: ${{ matrix.python-version }}
+
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install -e ".[test,dev]"
+
+    - name: Run tests
+      run: |
+        pytest
+
+    - name: Run ruff
+      run: |
+        ruff check .
+
+    - name: Run black
+      run: |
+        black . --check
+
+    - name: Run mypy
+      run: |
+        mypy mcp_shell_server tests