* Reverse engineering barchart models.cue from models.gen.ts
* Barchart models.cue and import fixes
* Add models.cue for piechart
* Use single-item syntax to dodge cuetsy bug
* Add some docs
Co-authored-by: sam boyer <sdboyer@grafana.com>
* piechart: support series override for hiding legend item
* piechart: add support for hiding values in multi tooltip
* tidy up variable names
* piechart: typing for hideFrom variable
* betterer fixes