Manage model stakeholder types in documentation

We have introduced several enhancements to the documentation for managing roles and stakeholder types within the ValidMind platform. These updates aim to provide clearer guidance and improve your ability to manage model inventory fields effectively.

• A new page has been added under "Managing users" to help you manage model stakeholder types effectively: Manage model stakeholder types
• A section on editing model stakeholders has been added to enhance your ability to manage model inventory fields: Managing users
• The documentation now refers to model stakeholder types instead of outdated role permissions, providing clearer guidance.