* (sl-split-panel) Add repeat expression and function expression to [snap].
* (sl-split-panel) Improve documentation.
* Improve split panel repeat() syntax, code cleanup.
- Move helper methods for split panel (toSnapFunction), and type definitions (SnapFunction, SnapFunctionParams) to split-panel.component.ts
- Allow repeat() to exist within other snap points in the split panel snap property. e.g. "repeat(100px) 50% 70% 90px" is now valid.
* Apply suggestions from code review
Co-authored-by: Cory LaViska <cory@abeautifulsite.net>
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Co-authored-by: Cory LaViska <cory@abeautifulsite.net>