feat(idl-v2): support `override` methods in services

[vobradovich]

File Location(s)

No response

Proposal

Support override methods for extended services

#[service(extends = base::Base)]
    impl Extended {
        #[export]
        pub fn extended_name(&self) -> String {
            EXTENDED_NAME_RESULT.to_string()
        }

       #[override(base::Base, 1)] // interface_id, entry_id
        pub fn name(&self) -> String {
            NAME_RESULT.to_string()
        }
    }