Enhancement of the MinIO admin client functionality with the group function

[Vedat-D]

Three functions have been added to the client.

A function (addUpdateGroup) to add a group with optional group membership or to update the membership of a Group.
A function (removeGroup) to delete a group.
Example:
Create an empty group:
minioClient.addUpdateGroup(groupName, Status.ENABLED, null);
Update membership of group :
minioClient.addUpdateGroup(groupId, Status.ENABLED, groupMembers);
Delete a group:
minioClient.removeGroup(groupName);

A function (getGroupInfo) to get information of a group.
Example:
Get info of a group:
GroupInfo groupInfo = minioClient.getGroupInfo(groupName);

A function (listGroups) to list all groups.
Example:
List all groups:
List<String> groupsMinio = minioClient.listGroups();

I have extracted the enum status but left it in the class UserInfo so as not to cause any breaking changes.
However, it is recommended to replace the code occurances "UserInfo.Status" with "Status" and then delete the code duplicate of UserInfo

[Vedat-D]

Hello together, what is the status here?