Add Example Environment Client JSON

`{"component":"synchronizer","config":{"repeat":1,"waitBefore":0.5,"waitAfter":10,"waitBetween":0.01,"isAsync":false},"children":[{"generator":{"name":"basic","config":{"key": "text", "contentLength":1000,"batchSize":40000}},"datajet":{"name":"stdout"},"stage":{"batchRate":1,"maxBatches":300}}]}`

The issue contains a JSON environment-client example but names no file, documentation location, or expected placement. First inspect the repository for existing environment examples and documentation conventions; done means the example is added in the appropriate location and remains valid JSON.

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