.Net: Specialized SSE parser as Utility (#5710)

### Motivation and Context

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Closes #5610 

### Description

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Specialized SSE parser implementation as internal utilities.

Code is partially borrowed from Azure sdk.

cc: @stephentoub @RogerBarreto @markwallace-microsoft 

### Contribution Checklist

<!-- Before submitting this PR, please make sure: -->

- [x] The code builds clean without any errors or warnings
- [x] The PR follows the [SK Contribution
Guidelines](https://github.com/microsoft/semantic-kernel/blob/main/CONTRIBUTING.md)
and the [pre-submission formatting
script](https://github.com/microsoft/semantic-kernel/blob/main/CONTRIBUTING.md#development-scripts)
raises no violations
- [x] All unit tests pass, and I have added new tests where possible
- [x] I didn't break anyone 😄

---------

Co-authored-by: Roger Barreto <19890735+RogerBarreto@users.noreply.github.com>

dotnet/SK-dotnet.sln

@@ -217,6 +217,10 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Text", "Text", "{EB2C141A-A
 	ProjectSection(SolutionItems) = preProject
 		src\InternalUtilities\src\Text\JsonOptionsCache.cs = src\InternalUtilities\src\Text\JsonOptionsCache.cs
 		src\InternalUtilities\src\Text\ReadOnlyMemoryConverter.cs = src\InternalUtilities\src\Text\ReadOnlyMemoryConverter.cs
+		src\InternalUtilities\src\Text\SseJsonParser.cs = src\InternalUtilities\src\Text\SseJsonParser.cs
+		src\InternalUtilities\src\Text\SseLine.cs = src\InternalUtilities\src\Text\SseLine.cs
+		src\InternalUtilities\src\Text\SseReader.cs = src\InternalUtilities\src\Text\SseReader.cs
+		src\InternalUtilities\src\Text\SseData.cs = src\InternalUtilities\src\Text\SseData.cs
 	EndProjectSection
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Linq", "Linq", "{607DD6FA-FA0D-45E6-80BA-22A373609E89}"

dotnet/src/Connectors/Connectors.Google.UnitTests/Core/Gemini/GeminiStreamResponseTests.cs

@@ -6,10 +6,14 @@
 using System.Text.Json;
 using System.Threading.Tasks;
 using Microsoft.SemanticKernel.Connectors.Google.Core;
+using Microsoft.SemanticKernel.Text;
 using Xunit;
 
 namespace SemanticKernel.Connectors.Google.UnitTests.Core.Gemini;
 
+#pragma warning disable CS0419 // Ambiguous StreamJsonParser reference in cref attribute (InternalUtilities)
+#pragma warning disable CS1574 // XML comment has cref StreamJsonParser that could not be resolved (InternalUtilities)
+
 /// <summary>
 /// Tests for parsing <see cref="GeminiResponse"/> with <see cref="StreamJsonParser"/>.
 /// </summary>

dotnet/src/Connectors/Connectors.Google/Core/Gemini/Clients/GeminiChatCompletionClient.cs

@@ -12,6 +12,7 @@
 using Microsoft.Extensions.Logging;
 using Microsoft.SemanticKernel.ChatCompletion;
 using Microsoft.SemanticKernel.Http;
+using Microsoft.SemanticKernel.Text;
 
 namespace Microsoft.SemanticKernel.Connectors.Google.Core;
 
@@ -501,7 +502,7 @@ await foreach (var response in this.ParseResponseStreamAsync(responseStream, ct:
         Stream responseStream,
         [EnumeratorCancellation] CancellationToken ct)
     {
-        await foreach (var json in this._streamJsonParser.ParseAsync(responseStream, ct: ct))
+        await foreach (var json in this._streamJsonParser.ParseAsync(responseStream, cancellationToken: ct))
         {
             yield return DeserializeResponse<GeminiResponse>(json);
         }