Improve linting to ensure enum values are explained in property descriptions.

Current situation

There's a single rule that checks whether values listed in the schema.enum field for a parameter are explained in the parameter description.

Conditions of acceptance

Add validation of descriptions according to the following conditions:

• If parameters.[parameter].schema.items.enum exists, then parameters.[parameter].description contains an explanation of all values listed in that enum field.
• If parameters.[parameter].content.[media object].schema.enum or parameters.[parameter].content.[media object].schema.items.enum exists, then parameters.[parameter].description contains an explanation of all values listed in that enum field.
• If requestBody.content.[media type].schema.enum or requestBody.content.[media type].schema.items.enum exists, then requestBody.description contains an explanation of all values listed in that enum field.
• If responses.[response].content.[media object].schema.enum or responses.[response].content.[media object].schema.items.enum exists, then responses.[response].description contains an explanation of all values listed in that enum field.

Also add checks that verify schema properties at any level of nesting/in the entire sub-tree in the schema, similarly to T424002:

• If schema.[properties on any level].[property].enum or schema.[properties on any level].[property].items.enum exists, then description for that exact property ([property].description) contains an explanation of all values listed in that enum field.

All checks described in this task should return a message with severity info in case of failure.