Cache Vello render output as stitchable textures (#3722)

* WIP render caching

* Hook up render cache to render pipeline

* Fixed offsets

* Initial cleanup

* Integrate cache with context invalidation

* Cleanup

* Improve rounding and reduce tile size to fix vello not rendering

* Include pointer position in cache key

* Avoid unwraps and zero sized textures

* Destroy textures after blitting to surface

* Fix context dependencies

* Exclude footprint from render params

* Batch animation frame messages

* Add vello max render size to preference dialogue

* Remove unused import

* Reorder vello preference

* Clean up preferences dialog

* Apply review suggestions

* Cap max render region size

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Co-authored-by: Keavon Chambers <keavon@keavon.com>

node-graph/nodes/gstd/Cargo.toml

@@ -51,6 +51,7 @@ node-macro = { workspace = true }
 reqwest = { workspace = true }
 image = { workspace = true }
 base64 = { workspace = true }
+wgpu = { workspace = true }
 
 # Optional workspace dependencies
 wasm-bindgen = { workspace = true, optional = true }