Feature Request: Microsoft Teams integration #298

Summary

Add a Microsoft Teams integration for Blink agents, mirroring the existing Slack integration (@blink-sdk/slack).

Motivation

Many organizations use MS Teams as their primary communication platform. Supporting Teams would significantly expand Blink's reach and allow agents to be deployed where these teams already work.

Proposed Scope

• New @blink-sdk/teams package (mirroring packages/slack/)
• Bot Framework activity handler (equivalent to Receiver)
• AI SDK tools: sendMessage, readMessages, readThreadReplies, getUserInfo, reactToMessage, reportStatus
• Message formatting for Teams (Adaptive Cards / Teams markdown)
• File attachment support via Graph API
• Scout agent wiring (lib/teams.ts) + TeamsConfig in ScoutOptions
• Webhook route (/teams) in agent entry point

Key Technical Considerations

• Azure AD app registration for auth (client ID/secret vs Slack's bot token/signing secret)
• Bot Framework SDK (botbuilder) + MS Graph API for channel/message operations
• Teams threading model differs from Slack's thread_ts approach
• Adaptive Cards for rich content (vs Slack blocks)
• SharePoint/OneDrive file handling (vs Slack file API)
• Stricter rate limits than Slack
• Proactive messaging requires stored conversation references