[Feature]: Group & Role based Access Control.

[npatil9]

Applications:

• [ ] Users can only view applications that they are authorized to view
• [ ] Users need authorization to be able to deploy their own Applications
• [ ] Users need authorization to be able to Purge Cache

API Keys:

• [ ] Users can view their own APIKeys
• [ ] Users need authorization to view APIKeys belonging to the group to which they belong
• [ ] Users need authorization to create their own APIKeys.
• [ ] Users need authorization to create APIKeys for groups to which they belong.
• [ ] While creating APIKeys for groups, users should get an option to choose from their groups if they belong to multiple groups
• [ ] Users can delete only their own APIKeys.
• [ ] Users need authorization to delete APIKeys belonging to the group to which they belong

Environments:

• [ ] Users need authorization to be able to view all environment details
• [ ] Users should be able to view environment details only for environments for which they have authorization

[sayak-sarkar]

This issue should cover the requirements from https://github.com/spaship/spaship/issues/72 and https://github.com/spaship/spaship/issues/448.