feature: added blocking start for genservers #11
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Motivation
In the tokio runtime (and other cooperative multitasking models) a single blocking task may stop executions or degrade performance of the entire program, as detailed in issue #8.
Description
This PR adds a method
start_blockingto the Genserver that launches the task in it's own thread, stopping from blocking. This is the same api both on concurrency and threads submodules, although threads already does this for every task.Closes issue #8