Description

The current schema JSON file (test/plot-schema.json which gets copied to dist/plot-schema.json) uses an indentation of 1 space per level. This makes it hard for a human to read. The indentation should be updated to 2 spaces per level.

Steps to reproduce

• Open test/plot-schema.json
• Try to read through it
• Rest your eyes and take something for the headache

Notes

• The script which builds the schema needs to be updated here in the calls to stringify
• This will create a huge diff in the schema but it will all be white space