* Replace the Artboard struct with a Table<Table<Graphic>> shape
* Remove the never-functional, seemingly unneeded migrate_type_descriptor_names due to typo
* Allow negative artboard sizes
* Improve the Data panel with more type-specific detail pages
* Add network_path to SetDisplayName so renames target any network depth
* Track nested layers via full editor:layer paths and rename parent_layer to path_of_subgraph
* Polish the data panel NodeId leaf page with an editable name field
* Make lock and visibility toggles work for layers in nested subgraphs
* Fix formatting
* Fix connected_to_output running in the wrong network for nested-layer toggles
* Move Vec<String> to Table<String>
* Remove old VecDVec2
* Move Vec<u8> to Table<u8>
* Move Vec<f64> to Table<f64>
* Move [f64; 4] to Table<f64>
* Move Vec<NodeId> to Table<NodeId>
* Tidy up the TaggedValue variants
* Move Vec<BrushStroke> to Table<BrushStroke>
* Add missing type implementations
* Fix tests
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* Fix click target propagation with the Rasterize node
* Add the 'Write Attribute' node
* Remove tag_layer in favor of the new Write Attribute node, prune redundant attribute writes
* Replace the Vector<Upstream> type argument with the "editor:merged_layers" attribute
Keavon Chambers
Dennis Kobert