Timeplus plugin

[jovezhong]

Adding a plugin for Timeplus, this is a streaming database, built on ClickHouse code base with similar features as Apache Flink, but all in C++

I updated the backend and frontend code based on the clickhouse plugin.

[jovezhong]

The plugin works now. To test it, you can run curl https://install.timeplus.com/oss | sh to install the Timeplus proton, and start it via proton server. Then connect it with

• host=localhost
• port=7587
• database=default
• user=default
• password=

I need to enhance this plugin further provide better SQL recommendation, such as understanding our SQL functions https://docs.timeplus.com/functions