fix: Add missing documentation about navigation properties

[skolmer]

Description

This adds missing documentation about auto generating maps for navigation properties and key based access.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist

• I have performed a self-review of my code
• I have added tests that prove my fix is effective or that my feature works
• I have made corresponding changes to the documentation
• I have commented my code, particularly in hard-to-understand areas
• New and existing unit tests pass locally with my changes

[what-the-diff]

PR Summary

• Updated documentation for gridifyMapper.md on controlling depth of mappings
  The team has added more details in the documentation about how to specify a parameter called maxNestingDepth. This can give users better control over the depth at which the mappings occur in the program.

• Added support for navigation properties in gridifyMapper.md documentation
  The updated documentation now includes how to handle navigation properties within the mappings, enhancing the flexibility of the software tool's functionality.

• Documentation for new methods: ClearMaps and GetCurrentMaps
  Information about two new methods, ClearMaps and GetCurrentMaps, has been introduced in the documentation for gridifyMapper.md. ClearMaps helps remove all existing mappings while GetCurrentMaps gives an overview of the current mapping setup. These methods provide more control over the tool's functionalities to the users, making it easier for them to manage and understand their mappings.