chore: update project structure and add testing framework

tests/api/__init__.py

@@ -0,0 +1 @@
+# API tests package

tests/api/test_root.py

@@ -0,0 +1,11 @@
+def test_read_root(client):
+    """
+    Test that the root endpoint returns the correct response.
+    """
+    response = client.get("/")
+    assert response.status_code == 200
+    data = response.json()
+    assert "message" in data
+    assert "documentation" in data
+    assert "version" in data
+    assert "auth" in data