[TODO] GPIO get/set direction not implemented

[smdn]

Get direction:

Smdn.Devices.MCP2221/src/Smdn.Devices.MCP2221/Smdn.Devices.MCP2221/MCP2221.GPs.GPIO.cs

Lines 82 to 88 in 1931ceb

	private static class GetDirectionCommand {
	public static void ConstructCommand(Span<byte> comm, ReadOnlySpan<byte> userData, GPFunctionality gp)
	=> throw new NotImplementedException();
	public static GPIODirection ParseResponse(ReadOnlySpan<byte> resp, GPFunctionality gp)
	=> throw new NotImplementedException();
	}

Set direction:

Smdn.Devices.MCP2221/src/Smdn.Devices.MCP2221/Smdn.Devices.MCP2221/MCP2221.GPs.GPIO.cs

Lines 112 to 118 in 1931ceb

	private static class SetDirectionCommand {
	public static void ConstructCommand(Span<byte> comm, ReadOnlySpan<byte> userData, (GPFunctionality gp, GPIODirection newDirection) args)
	=> throw new NotImplementedException();
	public static bool ParseResponse(ReadOnlySpan<byte> resp, (GPFunctionality gp, GPIODirection newDirection) args)
	=> throw new NotImplementedException();
	}