feat: project scaffolding with config files and test fixtures

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

kischdle/llmux/tests/conftest.py

@@ -0,0 +1,11 @@
+import os
+import pytest
+from pathlib import Path
+
+# Point config to the project's config directory for tests
+@pytest.fixture(autouse=True)
+def set_config_dir(tmp_path, monkeypatch):
+    """Use the project's config files for tests by default."""
+    config_dir = Path(__file__).parent.parent / "config"
+    monkeypatch.setenv("LLMUX_CONFIG_DIR", str(config_dir))
+    return config_dir