[ANALYZER-1545] - Ability to show data labels on charts and visualizations (Docs and Examples)
* Documented the new ValuesOverflow plot option.
* Updated the documentation of the ValuesOptimizeLegibility plot option to be on pair with latest improvements.
* Improved the description of the related ValuesAnchor plot option.
* Added documentation for the related and missing textMargin option of the Label extension point.
* Changed a few of the site's examples to show off the new feature.