This example uses the maya devkit cmake templates to build a simple plugin that creates a simple command. For more examples see the plugins folder in the maya devkit download.
First we need to download the devkit from here In the labs it is installed in /public/devel/23-24/maya2023_dev for maya 2023 and /public/devel/23-24/maya2024_dev for maya 2024.
To use this you will need to set the following variables when building
-DDEVKIT_LOCATION=/path/to/devkitTypically I add the location in the .bashrc file so that it is always set.