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_terminal.py

@@ -0,0 +1,17 @@
+import pytest
+
+from aiomql.lib.terminal import Terminal
+
+
+class TestTerminal:
+    @pytest.fixture(scope='class', autouse=True)
+    async def init_terminal(self):
+        terminal = Terminal()
+        init = await terminal.initialize()
+        return init, terminal
+
+    async def test_terminal(self, init_terminal):
+        init, terminal = init_terminal
+        assert init is True
+        assert terminal.connected is True
+        assert terminal.version is not None