[rozyczko]

Core compatibility and dependency updates:

• Updated the app and documentation to require the core-3.0 branch of reflectometry-lib

Parameter independence and pinning logic:

• Introduced a new is_independent helper to consistently check if parameters are editable, fitted, or constrained, accounting for both derived and pinned parameters.

Parameter display and naming improvements:

• Replaced usage of parameter.name with parameter.display_name in all user-facing contexts and display tables

Minimizer and fitting logic updates:

• Updated minimizer selection and references to use the new Minimizers enum from easyreflectometry instead of the old AvailableMinimizers from easyscience