Improvement/role type casting

[herpaderpaldent]

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[what-the-diff]

PR Summary

• Updated Role Model
  The 'Role' model now uses the 'RoleType' enumeration for the 'type' property, thus increasing the strictness of data types and preventing invalid data from being assigned.

• Added Type Casting in Role Model
  Type casting has been incorporated for the 'type' property in the 'Role' model. This guarantees that the property will always be treated as a 'RoleType' enumeration.

• Refactored setRoleType Method
  The method 'setRoleType' in the 'AbstractRoleService' has been refactored to compare 'RoleType' instances instead of their values. This direct comparison enhances code readability and understanding.

• Modified getTypeService Method
  The 'getTypeService' method in the 'BaseRoleService' has been modified to work with 'RoleType' instances instead of string values, offering a more specific and safer way to handle role types.

• Added getType Method
  A new method named 'getType' has been added in 'BaseRoleService'. It is used to fetch the role's type as a 'RoleType' instance, allowing easier and more accurate identification of a role's type.

• Changed canModerate Method
  The 'canModerate' method in 'OptInRoleService' now returns the result of 'isModerator' instead of always returning false. This reflects the actual moderator status of the role more accurately.

• Updated Tests
  Tests across various files have been updated to reflect the use of 'RoleType' enumerations instead of string values for role types. These tests ensure that the changes are working as expected.