Initialized openttd-client repo

.github/workflows/ci.yml

@@ -0,0 +1,54 @@
+name: Continuous Integration
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  lint-and-security:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.12'
+      
+      - name: Install Linting Tools
+        run: |
+          python -m pip install --upgrade pip
+          pip install ruff bandit
+      
+      - name: Lint with Ruff
+        run: ruff check .
+      
+      - name: Security Scan with Bandit
+        # We ignore B101 (assert) as it's common in tests, and B303 (MD5) 
+        # because OpenTTD protocol REQUIRES MD5 for company passwords.
+        run: bandit -r lib/ -ll -i -s B101,B303
+
+  tests-and-coverage:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.12'
+          
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install openttd-protocol pymonocypher pytest pytest-asyncio pytest-cov
+          
+      - name: Run Tests with Strict Coverage
+        env:
+          PYTHONPATH: lib
+          CI: true
+        # We run tests and fail if coverage is below 100%.
+        # E2E test is skipped in CI because no local OpenTTD server is available.
+        run: |
+          pytest --cov=openttd --cov-report=term-missing --cov-fail-under=100 -k "not test_server_connection_and_join" tests/