JSON schema to describe the YAML configurations

[jadamcrain]

https://json-schema-everywhere.github.io/yaml

https://json-schema.org/implementations.html

https://github.com/romaricdrigon/MetaYaml

https://www.npmjs.com/package/pajv#validate-data

https://www.tutorialspoint.com/yaml/yaml_json_schema.htm

https://medium.com/trabe/application-config-with-yaml-and-json-schema-validation-94a870855314

[emgre]

Add the ability for the adapter to emit JSON schemas for both the main configuration file, and for detailed mapping configurations for DNP3 and Modbus. YAML provides a superset of JSON’s functionality, and our limited usage makes them complete one to one.

• Generating the schemas and the default config files should leverage the same code base to ensure that the two can never be out-of-sync.
• The adapter should be able to validate against the schema. This goes further than our current config validation in that we can detect and error on fields that are not used/needed.