Add example and README for a streaming Lambda function #279

Job	Run time
musl	1m 38s
Integration Tests / Test Examples/HelloWorld on 6.0.1-amazonlinux2	1m 18s
Integration Tests / Test Examples/APIGateway on 6.0.1-amazonlinux2	1m 15s
Integration Tests / Test Examples/S3_AWSSDK on 6.0.1-amazonlinux2	3m 54s
Integration Tests / Test Examples/S3_Soto on 6.0.1-amazonlinux2	4m 34s
Integration Tests / Test Examples/Streaming on 6.0.1-amazonlinux2	1m 19s
Integration Tests / Test archive plugin	2m 30s
Soundness / API breakage check	1m 36s
Soundness / Documentation check	1m 25s
Soundness / Broken symlinks check	2s
Soundness / License headers check	3s
Soundness / Unacceptable language check	3s
Soundness / Format check	40s
Soundness / YAML lint check	3s
Soundness / Shell check	0s
Swift 6 Language Mode / Swift 6 language mode	1m 11s
Soundness / Python lint check	0s
Unit tests / Unit tests / Linux (5.9)	26s
Unit tests / Unit tests / Linux (5.10)	23s
Unit tests / Unit tests / Windows (${{ matrix.swift.swift_version }})	0s
Unit tests / Unit tests / Linux (6.0)	1m 23s
Unit tests / Unit tests / Windows (nightly-6.0)	2s
Unit tests / Unit tests / Windows (nightly-main)	3s
Unit tests / Unit tests / Linux (nightly-6.0)	1m 38s
Unit tests / Unit tests / Linux (nightly-main)	1m 40s
	27m 6s

Provide feedback