New Pattern Submission - Add Lambda Durable Functions testing pattern in TypeScript

[agawanea]

Issue #, if available:

• Demonstrates comprehensive testing strategies for AWS Lambda Durable Functions
• Includes 5 testing scenarios: basic workflows, retry logic, callbacks, parallel operations, and nested functions
• Uses LocalDurableTestRunner for fast local testing with time-skipping
• Includes CloudDurableTestRunner for integration testing
• All tests pass locally without AWS deployment
• Validated deployment in us-east-2 (Ohio) region

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