feat: add JSON converters for JsonElement, JsonObject, and JsonArray

[IvanMurzak]

This pull request introduces new JSON converters for handling JsonElement, JsonObject, and JsonArray types, and integrates them into the JsonSerializer. The converters provide schema support and proper serialization/deserialization logic for these types, improving the flexibility and standards-compliance of JSON handling in the project.

New JSON Converter Implementations:

• Added JsonElementJsonConverter to handle conversion and schema generation for JsonElement objects, including support for null values and writing logic.
• Added JsonObjectJsonConverter to handle conversion and schema generation for JsonObject objects, with logic for creating nodes from elements.
• Added JsonArrayJsonConverter to handle conversion and schema generation for JsonArray objects, supporting array items and references.
• Introduced a shared abstract base class JsonNodeJsonConverter<T> to encapsulate common logic for reading and writing JsonNode-derived types, including null handling and error reporting.

Integration:

• Registered the new converters in the JsonSerializer constructor to ensure they are used in serialization and deserialization processes.

[Copilot]

Pull Request Overview

This PR adds support for serializing and deserializing JsonElement, JsonObject, and JsonArray types by introducing dedicated JSON converters with schema generation capabilities.

Key Changes:

• Implemented three new JSON converters (JsonElementJsonConverter, JsonObjectJsonConverter, JsonArrayJsonConverter) with JSON schema support
• Created abstract base class JsonNodeJsonConverter<T> to share common serialization logic for JsonNode-derived types
• Registered the new converters in JsonSerializer to enable their use throughout the system

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
JsonSerializer.cs	Registers the three new JSON converters in the serializer's constructor
JsonNodeJsonConverter.cs	Provides abstract base implementation for reading/writing JsonNode types with null handling
JsonElementJsonConverter.cs	Implements converter for JsonElement with schema generation
JsonObjectJsonConverter.cs	Implements converter for JsonObject with schema generation
JsonArrayJsonConverter.cs	Implements converter for JsonArray with schema generation

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[Copilot]

Pull Request Overview

Copilot reviewed 5 out of 5 changed files in this pull request and generated 2 comments.

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[Copilot]

Pull Request Overview

Copilot reviewed 5 out of 5 changed files in this pull request and generated 2 comments.

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_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}

[Copilot]

Pull Request Overview

Copilot reviewed 6 out of 6 changed files in this pull request and generated 2 comments.

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