[CORE-8130] 2.4.y/project brief

[trtshen]

Jira: https://intersective.atlassian.net/browse/CORE-8130

This pull request introduces the Project Brief feature, which allows users to view structured project information for their team directly from the home page and the assessment interface. The implementation includes a new modal component, integration with existing services and pages, accessibility improvements, and comprehensive documentation and tests.

Project Brief Feature Implementation:

• Added a new ProjectBriefModalComponent to display team project brief details in a modal, including support for empty fields and accessibility best practices. [1] [2] [3] [4]
• Integrated the Project Brief modal into the assessment page, allowing reviewers to access the team’s project brief directly from the assessment interface. [1] [2] [3] [4]

Testing and Documentation:

• Added comprehensive unit tests for the new modal and its integration in the assessment component, ensuring correct modal behavior and button visibility. [1] [2] [3] [4] [5]
• Created detailed documentation in docs/features/project-brief.md covering data flow, component structure, integration points, styling, accessibility, sample data, and testing requirements.

Environment Configuration:

• Updated environment variable setup in multiple GitHub Actions workflow files to include CUSTOM_PROJECTHUB_URL, with appropriate values for each environment. [1] [2] [3] [4] [5]

[trtshen]

@shawnm0705 @Sunilsbcloud do we need setup "prerelease" version of project-hub? or just use back stage?