* Rework Gradient into a newtype of List<Color> with optional position and midpoint attributes
* Fix Vello stopless-gradient fallback coverage, empty legacy gradient tables, the node docs gradient swatch, NaN position elision, and wired setter input overwrites
* Macro support
* Preprocessor support
* Allow Cow str as scope name
* Use Passthrough node to work around compiler auto wrapping the producer node and invalidating the node id
* Stable NodeIds
* Less hacky but with bad performace
* Remove Cow from RegistryValueSource::Scope
* Connect scope injections to the inner network export
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Co-authored-by: Dennis Kobert <dennis@kobert.dev>
* Generate the MVP node catalog in the manual (with some placeholders)
* Implement nearly the rest of everything
* Move to the tools directory and make it generate nicer default values
* Add category descriptions
* Organize file structure and improve type naming
* Improve book table of contents code
* Add collapsing chapter navigation to the book template
* Add to build workflow
* Clean up site structure
