Add calendar scheduling crew with Temporal Cortex MCP

[billylui]

Summary

Adds a calendar scheduling crew under crews/calendar-scheduling/ that demonstrates multi-agent scheduling using Temporal Cortex MCP server and CrewAI's native MCPServerAdapter.

Three agents, three tasks:

• Temporal Analyst — orients in time using get_temporal_context and resolve_datetime
• Calendar Manager — discovers calendars and finds free slots with list_calendars and find_free_slots
• Scheduling Coordinator — books with book_slot (Two-Phase Commit, no double-bookings)

Why this example is useful:

• LLMs score <50% on temporal reasoning tasks (OOLONG benchmark) — this crew replaces guessing with deterministic computation
• Demonstrates MCP server integration via MCPServerAdapter — a pattern many CrewAI users are exploring
• Cross-provider calendar merging (Google + Outlook + CalDAV) in a single crew
• Follows the existing crews/ project structure (agents.py + tasks.py + main.py)

Files:

• agents.py — CalendarAgents class with 3 agent methods
• tasks.py — CalendarTasks class with 3 task methods
• main.py — Entry point using MCPServerAdapter context manager
• .env_example — Environment variable template
• README.md — Setup, customization, and cost information