Simplify flame-rs api for users

[k82cn]

Motivation

In flamepy, there're several upper API layer to simplify the code; but the flame-rs only provides the core part of api. This feature will enhance flame-rs with several helper class, functions and macro to simplify both the client code and service code.

Function Specification

Provide classes, functions and macros to simplify the Rust application.

Solutions

N/A

Additional context

N/A

[k82cn]

fixed by #456 & #457