NEW: @W-15652762@: Add configuration parsing and validation abilities

[stephen-carter-at-sf]

Adding in configuration parsing and validation which will allow clients to now pass in configuration data according the schema:

log_folder

• Specify a location to write log files to. If not specified, then your machine’s default temporary directory will be used.

rules.<engine_name>.<rule_name>.severity

• Specify the severity 1 (Critical), 2 (High), 3 (Moderate), 4 (Low), or 5 (Info) level as an integer that you want to set for the specified rule.

rules.<engine_name>.<rule_name>.tags

• Specify a list of tags to set for the specified rule.

engines.<engine_name>.<engine_specific_property>

• For the specified engine, you can specify any engine specific properties and values as needed.

Clients may pass in a yaml or json file, a yaml or json string, or an object.