[Proposal] Rabbit OJ v2.0

[ttzztztz]

• Replace RabbitMQ with Kafka (Mode1: MQ)

• Fully Kubernetes Support, Write Kubernetes Deploy file

• Judger can run in docker environment (Mode1: MQ)

• Remove DIND mode

• Update Languages Compiler Version

• Enhance Backend Websocket Performance by applying Concurrent Hashmap, Async Iteration, ... Refactor Websocket Codes

• (Low priority) Write a wholly new frontend with React.JS instead of Angular

• (Low priority) Write a new mobile application based on flutter/dart

• Refactor dir structure

• Update dependencies version

• (Low priority) OJ Community

• New Judger (Maybe) based on Rust

• Rerun pipeline, bug fix

• Decouple Judger component

• Distributed storage for test cases & submission codes

• Write unit tests for Tester module

• Dockerfile submodule auto-push to docker hub Github Actions

• Write unit test cases for Rabbit-OJ-Judger along with Github Actions scripts file

• Refactor Storage API & Scheduler / Start API

• Add Rust Language Support