Make the dynamic node graph execution asynchronous (#1218)

* Make node graph execution async

Make node macro generate async node implementations

Start propagating async through the node system

Async checkpoint

Make Any<'i> Send + Sync

Determine node io type using panic node

Fix types for raster_node macro

Finish porting node registry?

Fix lifetime errors

Remove Send + Sync requirements and start making node construction async

Async MVP

Fix tests

Clippy fix

* Fix nodes

* Simplify lifetims for node macro + make node macro more modular

* Reenable more nodes

* Fix pasting images

* Remove http test from brush node

* Fix output type for cache node

* Fix types for let scope

* Fix formatting

node-graph/gstd/src/brush.rs

@@ -14,7 +14,7 @@ pub struct ReduceNode<Initial, Lambda> {
 }
 
 #[node_fn(ReduceNode)]
-fn reduce<I: Iterator, Lambda, T>(iter: I, initial: T, lambda: &'any_input Lambda) -> T
+fn reduce<I: Iterator, Lambda, T>(iter: I, initial: T, lambda: &'input Lambda) -> T
 where
 	Lambda: for<'a> Node<'a, (T, I::Item), Output = T>,
 {