* add AgentWithHostedMCP sample * Update dotnet/samples/HostedAgents/AgentWithHostedMCP/README.md Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com> * Update dotnet/samples/HostedAgents/AgentWithHostedMCP/AgentWithHostedMCP.csproj Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com> * Update dotnet/samples/HostedAgents/AgentWithHostedMCP/AgentWithHostedMCP.csproj Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com> * Update dotnet/samples/HostedAgents/AgentWithHostedMCP/AgentWithHostedMCP.csproj Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com> * Use explicit type for mcpTool --------- Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>