feat: implement add functionality

pytest.ini

+[pytest]
+addopts = -v --cache-clear -rf --cov=src/app --cov-report=term --cov-report=html --maxfail=10
+console_output_style = count
+python_classes = Test*
+python_functions = test_*
+testpaths = tests
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src/__init__.py

+from .app import *

src/app/utils/__init__.py

+from .mymath import *

src/app/utils/mymath/addition.py

+class Math:
+    @staticmethod
+    def add(x: float, y: float) -> float:
+        return x + y
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src/main.py

+import src.app.utils.mymath.addition as addition
+
+
+def main():
+    print("Hello, World!")
+
+
+if __name__ == "__main__":
+    main()
+    print(addition.Math.add(1, 2))

tests/__init__.py

+from .utils import *
\ No newline at end of file

tests/utils/__init__.py

+from .mymath import *
\ No newline at end of file

tests/utils/mymath/test_addition.py

+import src.app.utils.mymath.addition as addition
+
+
+class TestMath:
+    def test_normal_scenario_1(self):
+        assert addition.Math.add(1, 2) == 3