This plugin makes the Pololu 3pi+ 2040 Robot and the Pololu Zumo 2040 Robot more usable with Thonny. It's mostly a copy of the built-in Pico plugin, but with "remote" files and directories disabled, since they are unnecessary for our version of MicroPython and can be confusing.
To install the plugin, open Thonny's "Tools" menu, click "Manage plug-ins...", and search for "thonny-pololu". You will need to restart after installing.
To build the project, see Packaging Python Projects. More information about maintaining plugins is available here.