create a sample(s) demoing recent feature layer and JSAPI improvements in querying

[tomwayson]

Examples:

• HAVING clauses: https://www.esri.com/arcgis-blog/products/arcgis-enterprise/data-management/querying-feature-services-having-clause/
• client-side LayerView queries: https://developers.arcgis.com/javascript/latest/guide/release-notes/4.8/index.html#full-client-side-support-for-layerview-queries

[tomwayson]

Thanks @jgravois for creating an initial bin showing how to use cedar w/ client-side LayerView queries!

https://jsbin.com/juqafec/edit?html,output

[tomwayson]

In the above bin some other code (JSAPI event handlers) executes the client-side queries and then hands the features off to cedar.

It would be better if cedar could actually initiate client-side LayerView queries. One idea for how to do that would be to add a new optional layerView property to a dataset that could be used in place of url. If that exists, chart.query() would call layerView.queryFeatures(query) instead of appending the query params to the url and fetching the features.