.NET: [Breaking] Move TextSearchProvider and TextSearchProviderOptions to Microsoft.Agents.AI namespace

[Copilot]

Motivation and Context

Relocates TextSearchProvider and TextSearchProviderOptions classes from Microsoft.Agents.AI.Data namespace to Microsoft.Agents.AI namespace for better API organization.

Description

• Namespace change: Both classes now use namespace Microsoft.Agents.AI; instead of namespace Microsoft.Agents.AI.Data;
• File relocation: Moved files from Data/ subdirectory to parent Microsoft.Agents.AI/ directory
• Updated consumers: Removed using Microsoft.Agents.AI.Data; from:
  • AgentJsonUtilities.cs
  • TextSearchProviderTests.cs

Note: Sample files retain the using Microsoft.Agents.AI.Data; statement and will be updated separately.

Before:

using Microsoft.Agents.AI.Data;

var provider = new TextSearchProvider(...);

After:

using Microsoft.Agents.AI;

var provider = new TextSearchProvider(...);

Contribution Checklist

• The code builds clean without any errors or warnings
• The PR follows the Contribution Guidelines
• All unit tests pass, and I have added new tests where possible
• Is this a breaking change? If yes, add "[BREAKING]" prefix to the title of the PR.

Original prompt

Move TextSearchProvider and TextSearchProviderOptions classes to Microsoft.Agents.AI namespace

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[SergeyMenshykh]

@copilot Please revert the exclusion of the AgentWithTextSearchRag project from the solution. The sample will be updated later.

[Copilot]

@copilot Please revert the exclusion of the AgentWithTextSearchRag project from the solution. The sample will be updated later.

Reverted the exclusion of AgentWithTextSearchRag from the solution in commit f2cf48b.

[Copilot]

Pull request overview

This PR relocates TextSearchProvider and TextSearchProviderOptions from the Microsoft.Agents.AI.Data namespace to the parent Microsoft.Agents.AI namespace to improve API organization.

• Moved namespace declaration from Microsoft.Agents.AI.Data to Microsoft.Agents.AI for both classes
• Removed obsolete using Microsoft.Agents.AI.Data; statements from all affected files

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
dotnet/src/Microsoft.Agents.AI/TextSearchProvider.cs	Updated namespace declaration from Microsoft.Agents.AI.Data to Microsoft.Agents.AI
dotnet/src/Microsoft.Agents.AI/TextSearchProviderOptions.cs	Updated namespace declaration from Microsoft.Agents.AI.Data to Microsoft.Agents.AI
dotnet/src/Microsoft.Agents.AI/AgentJsonUtilities.cs	Removed now-unnecessary using Microsoft.Agents.AI.Data; statement
dotnet/tests/Microsoft.Agents.AI.UnitTests/Data/TextSearchProviderTests.cs	Removed now-unnecessary using Microsoft.Agents.AI.Data; statement
dotnet/samples/GettingStarted/AgentWithRAG/AgentWithRAG_Step01_BasicTextRAG/Program.cs	Removed now-unnecessary using Microsoft.Agents.AI.Data; statement
dotnet/samples/GettingStarted/AgentWithRAG/AgentWithRAG_Step02_CustomVectorStoreRAG/Program.cs	Removed now-unnecessary using Microsoft.Agents.AI.Data; statement
dotnet/samples/GettingStarted/AgentWithRAG/AgentWithRAG_Step03_CustomRAGDataSource/Program.cs	Removed now-unnecessary using Microsoft.Agents.AI.Data; statement

[rogerbarreto]

Add [Breaking] to the title.