Update McpServer project template to ModelContextProtocol 1.0.0

[Copilot]

Bumps the MCP C# SDK references in the Microsoft.McpServer.ProjectTemplates package from 0.7.0-preview.1 to the first stable release 1.0.0.

Changes

• eng/packages/ProjectTemplates.props: ModelContextProtocol and ModelContextProtocol.AspNetCore → 1.0.0
• Microsoft.McpServer.ProjectTemplates.csproj: Aligns template package version with the now-stable SDK — bumps MajorVersion/MinorVersion to 1.0, removes PreReleaseVersionLabel/PreReleaseVersionIteration, and promotes Stage from preview to normal

Breaking changes assessment

All breaking changes between 0.7.0-preview.1 and 1.0.0 were reviewed. None affect the APIs used by the templates ([McpServerTool], AddMcpServer(), WithStdioServerTransport(), WithTools<T>(), WithHttpTransport(), MapMcp()). No template source changes are required.

Original prompt

Update the Microsoft.McpServer.ProjectTemplates project template ModelContextProtocol 1.0.0 (that was just releases). If needed, ensure all breaking changes have been compensated; they are noted on the https://github.com/modelcontextprotocol/csharp-sdk/releases page, broken down by release. In order to validate the changes to the template work as expected, the project template integration tests need to be run.

Created from Copilot CLI via the copilot delegate command.

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Microsoft Reviewers: Open in CodeFlow

[jeffhandley]

@davidortinau Before we merge this, let's touch base on if there's any reason to not mark this template package as stable (alongside the MCP SDK packages). I'm leaving as draft until we connect.

[jeffhandley]

All end-to-end integration tests passed locally