Add example for persistent queue implementation, as describe in the doc

[julienfr112]

"including persistent queues" in the ReadMe

I don't see how to do that, not having things like "skip locked" in yql ?

[fomichev3000]

Thank you for the comment. We are going to solve some issues with persistent queues api and provide documentation.

[alexv-smirnov]

Persistent queues referenced in REAMDE were earlier available as part of a separate project. How they are included as "topics" to the core YDB open source build, stable 22-4. Please check the following links:
https://ydb.tech/en/docs/concepts/topic (concepts)
https://ydb.tech/en/docs/reference/ydb-cli/topic-overview (CLI)
https://ydb.tech/en/docs/reference/ydb-sdk/topic (Go SDK)