draft: WIP SQS integration.

[belinux]

Description

SQS integration for sub/pub message/s.

Fixes #794

Type of change

• Documentation (typos, code examples, or any documentation updates)
• New feature (a non-breaking change that adds functionality)
• This change requires a documentation update

Checklist

• My code adheres to the style guidelines of this project (scripts/lint.sh shows no errors)
• I have conducted a self-review of my own code
• I have made the necessary changes to the documentation
• My changes do not generate any new warnings
• I have added tests to validate the effectiveness of my fix or the functionality of my new feature
• Both new and existing unit tests pass successfully on my local environment by running scripts/test-cov.sh
• I have ensured that static analysis tests are passing by running scripts/static-anaylysis.sh
• I have included code examples to illustrate the modifications

[Lancetnik]

I have to polish stable Redis release. Then, we can start to work on this on.

[Lancetnik]

Hello there! Sorry for waiting so long: I had to refactore project structure to unblock future featrues. Now we are ready to add a new broker support: are you still interested to help me with it?
Can you please update the branch to actual FastStream structure?