[feat]: Roles - List Permissions (users and roles) in tree and make searchable in tree search

[millerjp]

We need to add a new grouping under the cluster called "Permissions" to handle users and roles in the . We will start adding roles and users under there and searchable on the tree search

Permissions should not automaticaly be populated in the tree as its ultimately querying the system_auth keyspace to build this up and it could be a heavy set of queries to bring it back. Also, do not autatically repopulate this when refreshing the tree following schema changes. Just add a refresh icon next to Permissions and then populate this.

-- Cluster: mycluster
-- Keyspaces
-- Permissions (with a refresh icon next to this)
   |- Users (4)
      |- Standard (3)
         |- User 1
         |- User 2
         |- User 3
      |- Super Users (2)
         |- cassndra
         |- mydba
   |- Roles (3)
     |- Role 1
     |- Role 2
     |- Role 3

The CQL below will return all USERS and ROLES in Cassandra

LIST ROLES;

1 - To find standard users, you find roles where login is true and super is false

2 - To find super users, you find roles where login is true and super is true

3 - To find roles, you find roles where login is false and super is false

Make sure to test:
1 - When connected as a super user
2 - When connected as a standard user
3 - When connected without authentication
4 - When 100s of roles and users