Add Group Role-Based Block Visibility Condition

Problem/Motivation

Currently, the Group module does not provide a way to conditionally display blocks based on Group Roles within a Group Type. This feature request proposes adding a "Group Role Condition" plugin that allows administrators to control block visibility based on the roles assigned to users in different groups.

Steps to reproduce

• Try to configure block visibility based on Group Roles in the current Group module.
• Notice that there is no option to restrict block visibility using group roles.

Proposed resolution

• Provides an admin interface to configure block visibility based on Group Roles.
• Allows users to select specific roles within different Group Types.
• Ensures blocks are only displayed for users with matching group roles.