Fifo/Ring handlers behavior for 0 buffer size

[DenisBiryukov91]

Describe the feature

Currently Fifo handler with 0 buffer size will block indefinitely (behavior different from Zenoh-Rust where it turns in rendezvous channel), while Ring handler with 0 size will simply drop the messages (same as in Zenoh-Rust) For simplicity, it would probably make sense to forbid creation of handlers with 0 buffer size.

[sashacmc]

@milyin please assign it to me.