Rust attribute macro for camel case

Cargo.toml

[package]
name = "macro-test"
version = "0.0.0"
edition = "2021"

[dependencies]
macro-test-macros = { path = "./macros" }
serde = { version = "1.0.202", features = ["derive"] }
serde_json = "1.0.117"
specta = "1.0.5"

[workspace]
members = ["./macros"]

macros-Cargo.toml

[package]
name = "macro-test-macros"
version = "0.0.1"
edition = "2021"

[lib]
proc-macro = true

[dependencies]
proc-macro2 = "1.0.82"
quote = "1.0.36"

macros-src-lib.rs

use proc_macro::TokenStream;
use quote::quote;

#[proc_macro_attribute]
pub fn my_stuff(_attr: TokenStream, item: TokenStream) -> TokenStream {
    let item: proc_macro2::TokenStream = item.into();
    quote! {
        #[derive(serde::Serialize, specta::Type)]
        #[serde(rename_all = "camelCase")]
        #item
    }
    .into()
}

main.rs

use macro_test_macros::my_stuff;

#[my_stuff]
struct Test {
    a_b: i32,
}

fn main() {
    println!("{:?}", serde_json::to_string(&Test { a_b: 42 }).unwrap());
}