calendar gym environment from turing

[santoshsahturing]

Summary

This PR adds a new Calendar Environment to OpenEnv that exposes Google Calendar API functionality through MCP-style tools. The environment provides a complete calendar management system with support for events, calendars, settings, ACLs, and more, enabling AI agents to interact with calendar data through the OpenEnv reset/step/state interface.

Type of Change

• Bug fix
• New feature
• Breaking change
• Documentation
• New environment
• Refactoring

Alignment Checklist

Before submitting, verify:

• I have read .claude/docs/PRINCIPLES.md and this PR aligns with our principles
• I have checked .claude/docs/INVARIANTS.md and no invariants are violated
• I have run /pre-submit-pr (or bash .claude/hooks/lint.sh and tests) and addressed all issues

RFC Status

• Not required (bug fix, docs, minor refactoring)
• RFC exists: #rfcs/003-mcp-support.md
• RFC needed (will create before merge)

Test Plan

Server Setup & Health Check:

cd envs/calendar_env/server
docker build -t calendar-env:latest .
docker run --rm -p 8004:8004 calendar-env:latest
curl http://localhost:8004/health
# Expected: {"status":"healthy","service":"calendar-env"}

[greptile-apps]

Too many files changed for review. (111 files found, 100 file limit)

[burtenshaw]

this looks good @santoshsahturing . Have you also deployed it to the HF hub, and updated the environments page ?