Update lib.rs to expose DataEntry and Proto

[noci0001]

Hello, this pr aims to make the DataEntry and Proto definition available to allow to extraction of the actual primitive values from object Vec<DataEntry> returned by the function .get_current_values();

The public exposure: pub use databroker_proto::kuksa::val::{self as proto, v1::DataEntry};

Thanks to this change, I will be able to correctly parse the DataEntry objects like so:

            if let Some(ref _value) = entry.value {
                let speed_as_value = entry.value.and_then(|dp| dp.value);
                match speed_as_value {
                    Some(Float(value)) => {
                        speed = Some(value);
                    }
                    Some(Double(value)) => {
                        speed = Some(value as f32);
                    }
                    _ => {
                        error!("Invalid value type for speed");
                    }
                }
            }
        } else if entry.path == *vss::VSS_VEHICLE_CURRENTLOCATION_LATITUDE {
            if let Some(ref _value) = entry.value {
                let latitude_as_value = entry.value.and_then(|dp| dp.value);
                match latitude_as_value {
                    Some(Float(value)) => {
                        latitude = Some(value as f64);
                    }
                    Some(Double(value)) => {
                        latitude = Some(value);
                    }
                    _ => {
                        error!("Invalid value type for latitude");
                    }
                }
            }
        } else if entry.path == *vss::VSS_VEHICLE_CURRENTLOCATION_LONGITUDE {
            if let Some(ref _value) = entry.value {
                let longitude_as_value = entry.value.and_then(|dp| dp.value);
                match longitude_as_value {
                    Some(Float(value)) => {
                        longitude = Some(value as f64);
                    }
                    Some(Double(value)) => {
                        longitude = Some(value);
                    }
                    _ => {
                        error!("Invalid value type for longitude");
                    }
                }
            }
        }
    }

I remain available to assist in case anything would seem unclear!

[SebastianSchildt]

Thank you for your (first of many?) contribution. lgtm 🥳

[noci0001]

Thank you very much!