To add this to your Datasette installation, install the plugin like so:
pip install datasette-vega
The plugin will then add itself to every Datasette table view.
If you are publishing data using the
datasette publish command, you can
include this plugin like so:
datasette publish now mydatabase.db --install=datasette-vega
If you don't want to install any software at all, you can publish your CSV files with Datasette and activate this plugin using the web application at https://publish.datasettes.com/