chore: init tests structure

Author: azmeuk

pyproject.toml

@@ -23,10 +23,14 @@ funding = "https://github.com/sponsors/python-scim"
 [dependency-groups]
 dev = [
     "prek>=0.1.0",
+    "pytest>=8.2.1",
 ]
 doc = [
     "myst-parser>=3.0.1",
     "shibuya>=2024.5.15",
     "sphinx>=7.3.7",
     "sphinx-issues>=5.0.0",
 ]
+
+[tool.pytest.ini_options]
+testpaths = ["tests"]