Update Community Schema to Support Role-Based Permissions in UPv1

[Behzad-rabiei]

Description:

To facilitate the new role-based permission system in UPv1, the Community schema in Mongo-Lib needs to be updated. This involves adjusting the schema to accurately represent user roles and permissions within communities.

Tasks:

• Schema Redesign: Redesign the Community schema to incorporate roles and permissions, ensuring it can adequately support the new 'view' and 'admin' roles. The redesign should reflect the provided schema options and be optimized for efficient role and permission management.
• Auto-Assign Admin Role: Implement a mechanism within the Platform schema that automatically assigns the 'admin' role to the creator of the platform.
• Auto-Delete Role: Implement a mechanism within the Platform schema that automatically deletes roles associated paltform if platform deleted