Tags validation

[acabarbaye]

Describe the bug
If tags are not defined for a particular endpoint, the following error is raised:

> Task :runValidation FAILED
*ERROR* in Operation GET /.../ 'tags' -> The collection should be present and there should be at least one item in it

It is good to encourage tags to be set. However, it would be better if the validation could also ensure that the tags section was also filled and the tag ID set at the endpoint level was defined there. Would also be good to encourage the presence of a description.

Additional context
using openapi-style-validator-cli-1.11-all.jar

[JFCote]

Hi @acabarbaye, this is a great suggestion!