Function to check permissions for safe_* methods and guide for configuration

[villegar]

Summary

Add a function that verifies whether a given connection object (such as an Opal server) has the necessary permissions to run the generic methods under the 5 safes principles (e.g., safe_data(), safe_people(), safe_project(), etc.).

Requirements

• Implement a function that checks access rights for the relevant safe_* methods (at minimum: data, people, project, outputs/logs and settings/profiles).
• If permissions are insufficient, provide clear, actionable feedback to the user.
• Include in the feedback how to configure their server or user account to obtain the needed permissions (with links to relevant documentation or sections).
• The function should handle connections to Opal and should be extensible for other connection types in the future.
• Add examples and documentation for usage.

Rationale

• Users often encounter failures due to lack of permissions but are not provided with guidance.
• Helping users properly configure permissions will reduce confusion and improve adoption of the safe_* 5 safes principle methods.

Acceptance Criteria

• New function exists to check permissions for connection objects before calling safe_* methods.
• User-friendly messages and actionable guidance are returned on permission errors.
• Documentation and usage examples provided.

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References:

• 5 Safes Principles information: https://ukdataservice.ac.uk/help/secure-lab/what-is-the-five-safes-framework/
• Opal server user and permissions documentation: https://opal-demo.obiba.org/api-docs/