Add Tideways deployment notification task

[peterjaap]

This file contains a task to notify Tideways of deployments, including configuration options and usage instructions.

• [ ] Bug fix #…?

• [x] New feature?

• [ ] BC breaks?

• [ ] Tests added?

• [x] Docs added?

  Please, regenerate docs by running next command:
  $ php bin/docgen
  

[Schrank]

Thanks @peterjaap for the PR! <3 You could add after('deploy:success', 'deploy:tideways'); to the tideways.php it is only run if the file is included :-) then there is no additional setup needed

[Schrank]

(except tideway config 🙈)