Method interface

crates/cpp/src/lib.rs:316–336

(
        &'a mut self,
        resolve: &'a Resolve,
        name: Option<&'a WorldKey>,
        in_guest_import: bool,
        wasm_import_module: Option<String>,
    )

    }

    fn interface<'a>(
        &'a mut self,
        resolve: &'a Resolve,
        name: Option<&'a WorldKey>,
        in_guest_import: bool,
        wasm_import_module: Option<String>,
    ) -> CppInterfaceGenerator<'a> {
        let mut sizes = SizeAlign::default();
        sizes.fill(resolve);

        CppInterfaceGenerator {
            _src: Source::default(),
            r#gen: self,
            resolve,
            interface: None,
            _name: name,
            sizes,
            in_guest_import,
            wasm_import_module,
        }
    }

    fn clang_format(code: &mut String) {
        let mut child = Command::new("clang-format")