Add a table that shows all role memberships in a group

[segiddins]

[Copilot]

Pull Request Overview

This PR adds a new table section to display role memberships within a group view, showing which roles have access to the current group. The table displays role names, access types (Owner/Member), and expiration dates for active role mappings.

• Adds conditional rendering of a "Roles with Access" table for non-role groups
• Uses existing role mapping data (active_role_member_mappings and active_role_owner_mappings)
• Implements visual distinction between Owner and Member access types with colored chips

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[segiddins]

@somethingnew2-0 anything I can do to help this along?