fix: make JsonConverter classes public

[IvanJosipovic]

This PR updates all the JsonConverters to public

Reason

In order to be able to make custom SourceGeneration configs, the JsonConverters have to be public, otherwise an exception is thrown. Related to #1670

The name 'ResourceQuantity' does not exist in the current context

[JsonSerializable(typeof(KubernetesList<V1Pod>))]
[JsonSourceGenerationOptions(
    DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull,
    PropertyNamingPolicy = JsonKnownNamingPolicy.CamelCase,
    UseStringEnumConverter = true,
    Converters = new[] { typeof(Iso8601TimeSpanConverter), typeof(KubernetesDateTimeConverter), typeof(KubernetesDateTimeOffsetConverter), typeof(V1Status.V1StatusObjectViewConverter) })
]
public partial class CustomSourceGenerationContext : JsonSerializerContext
{
}

[Copilot]

Pull request overview

This PR makes JsonConverter classes public to enable custom SourceGeneration configurations. When JsonConverters remain internal, referencing them in custom JsonSourceGenerationOptions causes compilation errors.

Key Changes:

• Changed visibility of all JsonConverter classes from internal to public
• Applied changes consistently across both regular and AOT project files

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
src/KubernetesClient/Models/V1PatchJsonConverter.cs	Changed V1PatchJsonConverter from internal to public
src/KubernetesClient/Models/ResourceQuantityJsonConverter.cs	Changed ResourceQuantityJsonConverter from internal to public
src/KubernetesClient/Models/IntOrStringJsonConverter.cs	Changed IntOrStringJsonConverter from internal to public
src/KubernetesClient.Aot/V1PatchJsonConverter.cs	Changed V1PatchJsonConverter from internal to public in AOT project

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[tg123]

/LGTM

the reason i set them to private is that i do not want to hide as much as possible to make crazy change freely :)

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: IvanJosipovic, tg123

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