Improve C++ Arrow type Conversion

[haixuanTao]

We should improve dora C++ arrow type conversion at https://github.com/dora-rs/dora/blob/2488d0916c6dac4b6acb404d600c2ed025fd62d1/apis/c++/node/src/lib.rs

We can definetely do more than:

    let data = match metadata.type_info.data_type {
        dora_node_api::arrow::datatypes::DataType::UInt8 => {
            let array: &UInt8Array = data.as_primitive();
            array.values().to_vec()
        }
        dora_node_api::arrow::datatypes::DataType::Null => {
            vec![]
        }
        _ => {
            todo!("dora C++ Node does not yet support higher level type of arrow. Only UInt8. 
                The ultimate solution should be based on arrow FFI interface. Feel free to contribute :)")
        }
    };

[Codexgigaa]

@dora-bot assign me

[github-actions]

Hello @Codexgigaa, this issue is now assigned to you!

[Codexgigaa]

Hello @haixuanTao ,

I hope you're doing well! I have a few doubts regarding the project and would really appreciate your guidance. Could you please let me know the best place or platform where I can ask my questions or discuss these doubts with you?

Thank you for your help!

Best regards,
Lovish Bhardwaj

[haixuanTao]

We use discord: https://discord.gg/QHA96fP3