[Proposal] Rabbit OJ v2.0

[ttzztztz]

• [x] Replace RabbitMQ with Kafka (Mode1: MQ)

• [x] Fully Kubernetes Support, Write Kubernetes Deploy file

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

• [x] Remove DIND mode

• [x] Update Languages Compiler Version

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

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

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

• [x] Refactor dir structure

• [x] Update dependencies version

• [ ] (Low priority) OJ Community

• [x] New Judger (Maybe) based on Rust

• [x] Rerun pipeline, bug fix

• [x] Decouple Judger component

• [ ] Distributed storage for test cases & submission codes

• [x] Write unit tests for Tester module

• [x] Dockerfile submodule auto-push to docker hub Github Actions

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

• [x] Refactor Storage API & Scheduler / Start API

• [x] Add Rust Language Support