appsettings.json file support for the configuration and to allow run-time configuration changes

[tolgacakir]

this issue is created from here

[bberberoglu]

Maybe we can create custom data provider for this library and data source can be changed from appsettings,
please look this document https://learn.microsoft.com/en-us/dotnet/core/extensions/custom-configuration-provider.

for example; (this json scheme can be changed)
In appSettings -->
{
....
"NLocalizator": {
"DataProvider" : "File",
"Path" : "../../..." //Dataprovider read localization data from this path and reload if file changed
}
}

also this settings can be done with extention method which is used for adding library to startup.cs

Also custom configuration provider support IOptions/IOptionsSnapshot/IOptionsMonitor.

https://tsuyoshiushio.medium.com/option-patterns-with-custom-configuration-provider-in-net-1a2fca90c6c3