sftp binding component

[arslanmusta]

Description

Sftp binding component implementation

Issue reference

We strive to have all PR being opened based on an issue, where the problem or feature have been discussed prior to implementation.

Please reference the issue this PR will close: #3206

Checklist

Please make sure you've completed the relevant tasks for this PR, out of the following list:

• Code compiles correctly
• Created/updated tests
• Extended the documentation Sftp Binding Component Docs docs#4418

[ItalyPaleAle]

Thanks for this PR, it's interesting to see a new binding!

[github-actions]

This pull request has been automatically marked as stale because it has not had activity in the last 30 days. It will be closed in 7 days if no further activity occurs. Please feel free to give a status update now, ping for review, or re-open when it's ready. Thank you for your contributions!

[berndverst]

@arslanmusta next steps to make this a component:

• Open a docs PR for the new components in github.com/dapr/docs
• Work with dapr/dapr (runtime) maintainers to import the latest version of dapr/components-contrib and to register your new components. If the component isn't explicitly registered in dapr/dapr it essentially does not exist and cannot be used.