Support reading/writing `f32`, `f64` and `bool`

[jamwaffles]

Note that f64s cannot currently be passed to sdo_write as it only supports 4 byte expedited transfers currently.

[jubeor-gp]

Caution!! This has been tested with the revision 73440a66eca1509e6c8dd8da1aa7b4966aebc6e1

ethercrab = { git = "https://github.com/ethercrab-rs/ethercrab.git", rev = "73440a66eca1509e6c8dd8da1aa7b4966aebc6e1", features = [
    "serde",
] }

Testing reading and writing bool data:

let avg_mode_original = slave.sdo_read::<bool>(0x8000, 4).await?;
slave.sdo_write(0x8000, 4, false).await?;
let avg_mode_new = slave.sdo_read::<bool>(0x8000, 4).await?;
log::info!(
    "Avg Mode. Original {:?}, Updated {:?}",
    avg_mode_original,
    avg_mode_new
);

[jubeor-gp]

Testing f32

                    let nominal_original = slave.sdo_read::<f32>(0x8000, 0x23).await?;
                    slave.sdo_write(0x8000, 0x23, 4.0f32).await?;
                    let nominal_new = slave.sdo_read::<f32>(0x8000, 0x23).await?;
                    log::info!(
                        "Nominal. Original {:?}, Updated {:?}",
                        nominal_original,
                        nominal_new
                    );

Output: [2024-02-13T23:27:05Z INFO testing::ethercat_master] Nominal. Original 2.0, Updated 4.0

[jubeor-gp]

Warning: This test belongs to the revision {25596d55801b295d6a0afc20cd73532415e8fd0e} where bool is translated as false 0x00 true 0xff

ethercrab = { git = "https://github.com/ethercrab-rs/ethercrab.git", rev = "25596d55801b295d6a0afc20cd73532415e8fd0e", features = [
    "serde",
] }

Testing code:

                    let avg_mode_original = slave.sdo_read::<bool>(0x8000, 4).await?;
                    slave.sdo_write(0x8000, 4, false).await?;
                    let avg_mode_new = slave.sdo_read::<bool>(0x8000, 4).await?;
                    log::info!(
                        "Avg Mode. Original {:?}, Updated {:?}",
                        avg_mode_original,
                        avg_mode_new
                    );

Output: [2024-02-13T23:33:30Z INFO testing::ethercat_master] Avg Mode. Original true, Updated false