Crud granularity

[sdimitris]

Options for required authentication in differ crud operations provided.
Admin can decide whenever a CRUD operation can be done from an authenticated user.
Also , admin can decide if a CRUD route is disabled or enabled.

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update
• Refactor
• Build-related changes
• Other (please describe)

Other information:

modelOptions migrated to

  "modelOptions": {
    "conduit": {
      "cms": {
        "enabled": true,
        "crudOperations": {
          "create": {
            "enabled": true,
            "authenticated": false
          },
          "read": {
            "enabled": true,
            "authenticated": false
          },
          "update": {
            "enabled": true,
            "authenticated": false
          },
          "delete": {
            "enabled": true,
            "authenticated": false
          }
        }
      },
      "permissions": {
        "extendable": true,
        "canCreate": true,
        "canModify": "Everything",
        "canDelete": true
      }
    }
  },

Usage Example

modelOptions.conduit.cms.create.enabled = true  -> POST routes are accessible
modelOptions.conduit.cms.create.authenticated = true  ->POST routes are accessible only by authenticated users