Introduce redirect for https://quarkus.io/docs and https://quarkus.io/doc

[rsvoboda]

Quarkus documentation is located under https://quarkus.io/guides/

Please introduce redirect for https://quarkus.io/docs and https://quarkus.io/doc into https://quarkus.io/guides/

Motivation: When prompting LLMs about Quarkus I got response that the documentation is under https://quarkus.io/doc