feat: Add CLI for PyServe with configuration options

- Introduced a new CLI module (`cli.py`) to manage server configurations via command line arguments.
- Added script entry point in `pyproject.toml` for easy access to the CLI.
- Enhanced `Config` class to load configurations from a YAML file.
- Updated `__init__.py` to include `__version__` in the module exports.
- Added optional dependencies for development tools in `pyproject.toml`.
- Implemented logging improvements and error handling in various modules.
- Created tests for the CLI functionality to ensure proper behavior.
- Removed the old `run.py` implementation in favor of the new CLI approach.

tests/test_cli.py

@@ -0,0 +1,50 @@
+import pytest
+from unittest.mock import patch, MagicMock
+from pyserve.cli import main
+
+
+def test_cli_version():
+    with patch('sys.argv', ['pyserve', '--version']):
+        with pytest.raises(SystemExit) as exc_info:
+            main()
+        assert exc_info.value.code == 0
+
+
+def test_cli_help():
+    with patch('sys.argv', ['pyserve', '--help']):
+        with pytest.raises(SystemExit) as exc_info:
+            main()
+        assert exc_info.value.code == 0
+
+
+@patch('pyserve.cli.PyServeServer')
+@patch('pyserve.cli.Config')
+def test_cli_default_config(mock_config, mock_server):
+    mock_config_instance = MagicMock()
+    mock_config.return_value = mock_config_instance
+    mock_server_instance = MagicMock()
+    mock_server.return_value = mock_server_instance
+    
+    with patch('sys.argv', ['pyserve']):
+        with patch('pathlib.Path.exists', return_value=False):
+            main()
+    
+    mock_config.assert_called_once()
+    mock_server.assert_called_once_with(mock_config_instance)
+    mock_server_instance.run.assert_called_once()
+
+
+@patch('pyserve.cli.PyServeServer')
+@patch('pyserve.cli.Config')
+def test_cli_custom_host_port(mock_config, mock_server):
+    mock_config_instance = MagicMock()
+    mock_config.return_value = mock_config_instance
+    mock_server_instance = MagicMock()
+    mock_server.return_value = mock_server_instance
+    
+    with patch('sys.argv', ['pyserve', '--host', '127.0.0.1', '--port', '9000']):
+        with patch('pathlib.Path.exists', return_value=False):
+            main()
+    
+    assert mock_config_instance.server.host == '127.0.0.1'
+    assert mock_config_instance.server.port == 9000