* refactor color scheme
* Update data structure
* Update color scheme files
* wip
* convert all sequential schemes
* Update how color schemes are managed. Extend it for sequential schemes
* extract color setup into separate file
* Update imports
* update imports
* Add new functions to Registry
* Update ColorSchemeManager to extends Registry and update unit tests
* Add test for Registry
* Rename ColorSchemeManager to ColorSchemeRegistry
* Fix unit tests
* Update API
* Fix imports
* Add label field
* Fix reference to colors
* update SequentialScheme contructor
* Fix controls
* rename manager to registry
* Split sequential schemes into multiple files
* update sequential color labels
* add values and valuesAsPromise()
* use .values()
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