Derive macros for ev3devlangrust

This crate provides some derive macros to simplify the codebase.

The following traits can be automatically derived:

• Device
• Findable
• Motor
• TachoMotor
• ServoMotor
• DcMotor
• Sensor

The findable derive needs 3 additional attributes. * class_name: &str * driver_name: &str * port: dyn ev3dev_lang_rust::Motor

Example

The functionallity of the LargeMotor struct consists complitly through derives:

```rust

[derive(Debug, Clone, Device, Findable, Motor, TachoMotor)]

[class_name = "tacho-motor"]

[driver_name = "lego-ev3-l-motor"]

[port = "crate::motors::MotorPort"]

pub struct LargeMotor { driver: Driver, } ```