[Feat]: Fill-start in slider should respect 0-values as well as normalization function

[spdev3000]

Code of conduct

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Impacted component(s)

Silder

Description of the requested feature

1. Currently fill-start attribute only allows to set values !== 0, but sometimes clients have sliders with min<0 , so for example: min="-100", max="200" - so we need a possibility to define fill-start="0" to not start from centered track position
2. Also currently the fill-start calculation doesn't respect any provided normalization function, so we'd like to calculate all fill-related values (offset + length) by a given normalization function of model of active handle

Mockups or screenshots

Implementation notes or ideas

No response