Reactive Component: Separate Doc

[siddharthlatest]

A document showing the use of ReactiveComponent without any child component use. This would go under Base Components section of docs. It will be a subset of the docs for the ReactiveComponent under Advanced section.

Things to highlight:

• How to use RC effectively with defaultQuery, customQuery, setting filter label / value,
• An example showcasing some of the above,
• Associated stories.

ReactiveComponent is the single most important component as it allows using ElasticSearch APIs akin to how Firebase APIs can be integrated within a React app. We need to how you can set any aggregation or query in a standalone mode.