feat: add a Database Lab CLI tool (#52)

Description

Create a CLI tool for using Database Lab API.

Related issue

(#52 (closed) )

Examples

// Clone management
dblab clone list
dblab clone create
dblab clone destroy CLONE_ID
dblab clone reset CLONE_ID
dblab clone status CLONE_ID

// Instance management
dblab instance status
// ? dblab instance config

// Snapshot management
dblab snapshot list

// CLI management
dblab config create ENVIRONMENT_ID
dblab config update ENVIRONMENT_ID
dblab config status ENVIRONMENT_ID
dblab config list
dblab config switch ENVIRONMENT_ID
dblab config remove ENVIRONMENT_ID

// Getting started
dblab init

Checklist

• the MR description has been reviewed
• this MR contains text changes and they have been reviewed OR there are no texts changes
• this MR contains GUI/CLI changes and they have been reviewed OR there are no GUI/CLI changes
• this MR contains API changes and they have been reviewed OR there are no API changes