Code cannot be overridden for custom validator

[akkie]

The documentation indicates that the code can be overridden for a custom validator.

https://github.com/akkie/validator?tab=readme-ov-file#message-and-code

But this doesn't work. There is also no test for it.

[nMessage]

Specifying a custom Error code for Custom Validation checks fails.
eg

#[derive(Validate, Deserialize)]
pub struct ExampleStruct {
    #[validate(custom = "custom_check", code = "Custom error")]
    foo: String,
}

When using a custom validator like this, when a code is specified, Compiler errors with "validate not implemented for this struct"

The bellow example works just fine however.

#[derive(Validate, Deserialize)]
pub struct ExampleStruct {
    #[validate(custom = "custom_check")
    foo: String,
}

[Keats]

Can you check with #249 ?