Can't use `#[boa(from_js_with = "...")]` or `#[boa(into_js_with = "...")]` when deriving both `TryFromJs` and `TryIntoJs`

[mccolljr]

Describe the bug

If I am deriving both TryFromJs and TryIntoJs, I can't use #[boa(from_js_with = "...")] or #[boa(into_js_with = "...")] as each macro complains about the other's annotation.

To Reproduce

This example code:

#[derive(TryFromJs, TryIntoJs)]
struct Blah {
    #[boa(into_js_with = "my_custom_converter_to_js")]
    #[boa(from_js_with = "my_custom_converter_from_js")]
    x: i32,
}

Results in two error messages:

invalid syntax in the #[boa()] attribute. Note that this attribute only accepts the following syntax: #[boa(from_js_with = "fully::qualified::path")]

invalid syntax in the #[boa()] attribute. Note that this attribute only accepts the following syntax:
#[boa(into_js_with = "fully::qualified::path")]
#[boa(rename = "jsPropertyName")]
#[boa(skip)] 

Expected behavior
I expected to be able to specify one or more custom conversion functions when deriving both TryIntoJs and TryFromJs on the same type.

Build environment:

• OS: MacOS
• Version: 15.7.3
• Target triple: aarch64-apple-darwin
• Rustc version: rustc 1.92.0 (ded5c06cf 2025-12-08)