* Added expressionMetricVis plugin.
* splited metric vis_type and expression.
* Fixed plugin docs.
* updated snapshots.
* Added code owner to expressionMetricVis.
* updated chart docs.
* Added storybook.
* Added bucket story.
* Added without label story.
* Added "with custom font size" story.
* Added other stories.
* Added DatatableColumn accessors.
* Replaced Metric with MetricOptions.
* added element to canvas.
* Added metric_vis ui model to canvas and removed `useRanges`.
* Fixed MetricOptions.any
* updated the check of min/max existence.
* Updated function/renderer names.
metricRenderer -> metricVisRenderer
metricFunction -> metricVisFunction
* Replaced colorRanges/invertColors/percentageMode with palette.
* Replaced legacy colors with palette.
* Remove usage of arguments bgFill and subText.
* Added mocks for storybook.
* removed dead code from `vis_types`.
* Support of custom font is added.
* Added support of custom labels.
* Added multitable support.
* Added support of multitable and autoresize.
* Cleaned up metric expression and tests
* added center to the metric to_ast.
* added first_datatable type.
* Changed first_datatable to lens_multitable.
* Fixed behaviour with rangeMin and rangeMax.
* Added fontUnit to the font expression and added pt option to the metricVis expression.
* Added comment to the metricVis expression at to_ast of vis_types/metric.
Co-authored-by: Kibana Machine <42973632+kibanamachine@users.noreply.github.com>