Add a ThrottledWorker

[Frank Mueller]

• Add a ThrottledWorker
• It is created with a Contex, a Limit, and a Burstas arguments
• Limit is a number of requests per second
• Burst is the number of requests at a time

[Frank Mueller]

Ensure a graceful context shutdown. It has to append a shutdown actionTask and block future input with a shutdown error.

[Frank Mueller]

Worker uses a flexible queue as buffer providing a function for input actionTask and a function returning a channel for an iteration pattern.