Clean up Organization component

[dgading]

The Organization component can be the first text for the new 2.0.0 update.

• Change component to arrow function
• Pass props in instead of destructuring a single props prop
• remove hard coded Organization Image alt name prop
• Make search url path a prop, some sites may not use /search for dataset searches
• all classNames are now props and their default is based on USWDS (maybe cards?)
• Link alt text is not hardcoded
• Prop types all defined and each has a commented line above it explaining it's purpose.
• Complete or almost complete test coverage for the component
• Tests include jest axe to have no violations test.
• Docz file updated to document the component to explain it's usage

The prop type comments should look like

/**
   * This is a pretty good description for this prop.
   */

This will result appear in the Docz file for this component, see https://www.docz.site/docs/built-in-components for more examples.