Add example and README for a streaming Lambda function #277

Job	Run time
musl	1m 38s
Soundness / API breakage check	1m 40s
Soundness / Documentation check	1m 24s
Integration Tests / Test Examples/HelloWorld on 6.0.1-amazonlinux2	1m 14s
Integration Tests / Test archive plugin	2m 55s
Integration Tests / Test Examples/APIGateway on 6.0.1-amazonlinux2	1m 20s
Soundness / Unacceptable language check	2s
Integration Tests / Test Examples/S3_AWSSDK on 6.0.1-amazonlinux2	2m 38s
Soundness / Broken symlinks check	5s
Integration Tests / Test Examples/S3_Soto on 6.0.1-amazonlinux2	2m 36s
Soundness / Format check	43s
Soundness / License headers check	3s
Integration Tests / Test Examples/Streaming on 6.0.1-amazonlinux2	1m 14s
Soundness / Python lint check	0s
Soundness / Shell check	0s
Soundness / YAML lint check	4s
Swift 6 Language Mode / Swift 6 language mode	1m 10s
Unit tests / Unit tests / Linux (5.9)	26s
Unit tests / Unit tests / Linux (5.10)	22s
Unit tests / Unit tests / Windows (${{ matrix.swift.swift_version }})	0s
Unit tests / Unit tests / Linux (6.0)	1m 23s
Unit tests / Unit tests / Linux (nightly-6.0)	1m 44s
Unit tests / Unit tests / Windows (nightly-6.0)	3s
Unit tests / Unit tests / Windows (nightly-main)	3s
Unit tests / Unit tests / Linux (nightly-main)	1m 46s
	24m 33s

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