[doc] docker quick start flink

[FireFreedomK]

Purpose

Linked issue: #1151

Add a docker folder in the project root path to store docker compose file. In this PR, a new flink_docker_compose.yml file is added to quickly start the Flink cluster, and paimon-related jar files are introduced. A flink SQL-client container is started with flink_docker_compose.yml to execute the relevant SQL statements to create the catalog and tables, write and query the data.

In the future, add files such as spark3_docker_compose.yml and hive_docker_compose.yml in the docker/ path to quickly build related cluster environments.

New quick_start.md file under docs/content/engines/ that describes how to quickly build flink and paimon environments and how to use paimon through Flink sql-client.

Follow-up quick-start documents such as Spark and Hive will be appended to the file.

Tests

no

API and Format

no

Documentation

no

[pengmide]

Is this PR still in progress? @FireFreedomK @SteNicholas @JingsongLi

[JingsongLi]

Hi @pengmide , it looks like there is no enough requirement for docker quickstart now.