microsoft/teams.net

Commit

Support multiple MCP tools and refactor auth handling

Agent now aggregates Teams, Mail, Calendar, and Me MCP tools by connecting to multiple MCP server URLs. IMcpClientFactory requires a serverUrl for client creation. Authentication logic was moved from the removed McpAuthenticationHandler into McpClientFactory, which now attaches tokens via AdditionalHeaders. Updated chat client registration to use the new builder pattern. Added typing activity feedback in TeamsBotAppHandlers.