Use System.Text.Json.Nodes.JsonNode instead of JObject

[moreal]

Background

Now, it uses JObject class of Newtonsoft.Json to parse JSON string and to handle JSON as dynamic object, not class type.
But there is a builtin alternative for the JObject, and it is System.Text.Json.Nodes.JsonNode.

You can refer the below items:

• https://learn.microsoft.com/en-us/dotnet/standard/serialization/system-text-json/use-dom
• https://learn.microsoft.com/en-us/dotnet/api/system.text.json.nodes.jsonnode?view=net-8.0

If it uses JSON as readonly mode, you can use JsonDocument

Work items

• mimir/Mimir.MongoDB/Json/Converters/MaterialAndIntDictionaryJsonConverter.cs

  Line 23 in 65a6e71

  var jObject = JObject.Load(reader);

[TheMarvelFan]

Hi, is anyone working on this issue?
If not, I would like to take it up.

[Atralupus]

Hi, is anyone working on this issue? If not, I would like to take it up.

Sure, that's possible! However, since you've already been assigned two GFI tasks, we won't be able to assign more GFIs to you for now.
Happy hacking!

[TheMarvelFan]

Hi @moreal ,

Hacktoberfest has now started accepting contributions, so this PR can be merged now.
But, it is not detecting my PR for this issue as a part of Hacktoberfest. This is most probably because of the label of 'hacktoberfest' on this issue needs to start with a captial 'H', i.e., 'Hacktoberfest'.
Once this is done, I think it will detect my PR, and it can then be merged.

Thanks!