Add top level parameter file module

[KedoKudo]

This PR introduces the top level parameter file handler for constructing, loading and exporting the parameter file module.

EWM item: 8967

AI summary
This pull request introduces a new Jupyter notebook example for the sammy.parameter module, refactors several classes and methods, and updates imports in the pleiades.sammy.parameters package. The most important changes include the addition of a new notebook example, refactoring of the RadiusCard and ResonanceCard classes, and updates to the BroadeningParameterCard class.

New example notebook:

• notebook/sammy.param/example.ipynb: Added a new Jupyter notebook demonstrating how to use the sammy.parameter module to load, construct, and manipulate parameter files for the SAMMY suite.

Class and method refactoring:

• src/pleiades/sammy/parameters/radius.py: Added a new is_header_line method to the RadiusCard class, updated the from_lines method to handle integer conversion for VaryFlag, and changed the default format in the to_lines method to KEYWORD. [1] [2] [3]
• src/pleiades/sammy/parameters/resonance.py: Introduced the ResonanceCard class to encapsulate resonance entries, including methods for parsing from lines and converting to lines. [1] [2]

Updates to existing classes:

• src/pleiades/sammy/parameters/broadening.py: Refactored the to_lines method in the BroadeningParameterCard class to improve code readability and formatting of the output lines.

Import updates:

• src/pleiades/sammy/parameters/__init__.py: Updated imports to include ExternalRFunction and ResonanceCard for improved module encapsulation and functionality.