reorganize the library into three folders lib, contrib and core

Write unittests with pytest
Make all functions and method signatures as keyword only arguments

tests/unittests/test_base.py

@@ -0,0 +1,60 @@
+import pytest
+from aiomql.core.base import Base
+
+
+class ChildClass(Base):
+    attr: int
+    attr2: str
+    cls_attr: int = 10
+
+
+class TestBaseClass:
+    @pytest.fixture
+    def child(self):
+        return ChildClass(attr=1, attr2="test")
+
+    def test_repr(self, child):
+        repr_str = repr(child)
+        assert repr_str.startswith("ChildClass(")
+        assert "attr=1" in repr_str
+        assert "attr2=test" in repr_str
+
+    def test_set_attributes(self, child):
+        child.set_attributes(attr3=3.14, attr2='str')
+        assert child.attr2 == 'str'
+        assert getattr(child, 'attr3', None) is None
+
+    def test_annotations(self, child):
+        annotations = child.annotations
+        assert isinstance(annotations, dict)
+
+    def test_get_dict(self, child):
+        child.set_attributes(attr2='test')
+        result = child.get_dict()
+        assert result["attr"] == 1
+        assert result["attr2"] == "test"
+
+    def test_get_dict_with_exclude(self, child):
+        child.set_attributes(attr2='test')
+        result = child.get_dict(exclude={"attr"})
+        assert "attr" not in result
+        assert result["attr2"] == "test"
+
+    def test_get_dict_with_include(self, child):
+        child.set_attributes(attr3=3.14)
+        result = child.get_dict(include={"attr"})
+        assert result["attr"] == 1
+        assert "attr2" not in result
+
+    def test_class_vars(self, child):
+        class_vars = child.class_vars
+        assert isinstance(class_vars, dict)
+        assert 'cls_attr' in class_vars
+        assert 'attr' not in class_vars
+
+    def test_dict_property(self, child):
+        child.set_attributes(attr2="test")
+        dict_prop = child.dict
+        assert dict_prop["attr"] == 1
+        assert dict_prop["attr2"] == "test"
+        assert dict_prop["cls_attr"] == 10