Feat/ab#58619 extend layer model in back end

[ketanreliefapps]

Description

Extend layer model, with new properties
To guide you, you can check the leaflet-esri repo I shared on slack dev channel
You would see some logs, we want to have something similar to what we see in operationalLayers there:
What is missing in current model and we want to replicate:

• visibility
• layerType -> only FeatureLayer at the moment
• layerDefinition:
• featureReduction: json
• drawingInfo: json
• popupInfo:
• popupElements: array of JSON
• description: text

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Improvement (refactor or addition to existing functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

currently i have done only backend

Checklist:

• * My code follows the style guidelines of this project
• * Linting does not generate new warnings
• * I have performed a self-review of my own code
• * I have commented my code, particularly in hard-to-understand areas
• * I have put JSDoc comment in all required places
• * My changes generate no new warnings
• * I have included screenshots describing my changes if relevant
• * I have selected labels in the Pull Request, according to the changes with code brings
• I have made corresponding changes to the documentation ( if required )
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules