Brush plugin is a plugin that allows players to draw by looking at blocks.
Players can modify their brush using the /brush command.
It allows them to change the brush range or the brush material by clicking a block in their inventory.
Currently, the plugin is available for 1.20.2 (i haven't test other versions yet)
You can use the plugin without database, but the server won't save players brush upon reload/restart
If you want to, you have to setup a mongo db database.
You can follow the tutorial here : https://www.mongodb.com/docs/atlas/getting-started/?jmp=docs_driver_java
Once done, you have to create a database named "brush_plugin" and a collection inside "player_data".
Then, put the link to access your database from a driver in the "config.yml" inside the plugin config folder as shown bellow :
mongoDbUrl: <your_db_link>
That's it, you can use the plugin on your server :)