Add layer node chains, import/export edge connectors, and refactor graph editing to go thru a NodeNetworkInterface (#1794)
* WIP: NodeNetworkInterface
* Organize ModifyInputsContext to use network interface
* Improve ClickTarget and Position state
* Rework ClickTarget state
* Continue fixing NodeGraphMessageHandler
* Restructure network_metadata
* Final(?) NodeNetworkInterface struct
* Final(??) NodeNetworkInterface
* Final(???) NodeNetworkInterface. Separated persistent and transient data
* Final NodeNetworkInterface data structure. Implemented all basic getters
* Continue migrating functionality to network interface
* Migrate all NodeGraphMessage's to use network interface
* Fix all helper functions in NodeGraphMessageHandler
* Move document metadata to network interface, remove various cached fields
* Move all editor only NodeNetwork implementations to NodeNetworkInterface
* Fix all DocumentNodeDefinitions
* Rework and migrate GraphOperationMessages to network interface
* Continue migration to NodeNetworkInterface
* Save point before merging master
* Fix all errors in network_interface
* 850 -> 160 errors
* Fix all errors :D
* Render default document
* Visualize click targets
* merge conflicts
* Cache transient metadata separately, store entire interface in document history
* Start migration to storing selected nodes for each network
* Remove selected nodes from document message handler
* Move outward wires and all nodes bounding box to transient metadata
* Fix connecting/disconnecting nodes
* Layer stack organization for disconnecting/connecting nodes
* Basic chain locking
* Improve chain positioning
* Add copy/pasting
* Move upstream nodes on shift+drag
* merge conflict fixes
* Improve Graph.svelte code quality
* Final improvements to Graph.svelte
* Fix layer panel
* Performance optimizations
* Bug fixes and derived PTZ
* Chain organization improvement and bug fixes
* Bug fixes, remove all warnings
* Automatic file upgrade
* Final code review
* Fix editor tests
* Fix compile errors
* Remove select tool intersection check when panning
* WIP: Import/Exports
* Fix JS issues
* Finish simplified import/export UI
* Import/Export viewport edge UI
* Remove minimum y bound on import/export ports
* Improve performance while panning graph
* cargo fmt
* Fix CI code build
* Format the demo artwork graph with chains
* Code review
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Co-authored-by: Keavon Chambers <keavon@keavon.com>
Co-authored-by: dennis@kobert.dev <dennis@kobert.dev>