Refactor user read page into categorized split-table layout

[somethingnew2-0]

Summary

• Reorganizes the user read page from two flat tables (Owner of Groups/Roles, Member of Groups/Roles) into three sections by group type: Access Roles, App Groups, and Standard Groups
• Each section shows side-by-side Ownerships and Memberships tables, replacing the previous separate full-width tables
• App Groups are further sub-grouped by app, with clickable app name headers linking to /apps/{appName}
• Sections are hidden when both ownerships and memberships are empty for that type
• Replaces the duplicated OwnerTable/MemberTable components with a single unified GroupTable component parameterized by an owner boolean
• Drops the Type column from tables since items are now categorized by section