Rebuild core around render graph AST and shared memory

Amp-Thread-ID: https://ampcode.com/threads/T-01a01380-b478-77d0-84a0-102880a5c5ae
Co-authored-by: Heaust Azure <heaust.azure@gmail.com>

addons/render-graph-js/package.json

@@ -0,0 +1,10 @@
+{
+  "name": "@yawn/render-graph-js",
+  "version": "0.1.0",
+  "description": "JSO and builder frontend for Yawn render graphs",
+  "type": "module",
+  "exports": "./src/index.js",
+  "dependencies": {
+    "@yawn/render-graph-ast": "0.1.0"
+  }
+}

addons/render-graph-js/src/index.js

@@ -0,0 +1,67 @@
+import {
+  createGraphAst,
+  reference,
+  serializeGraphAst,
+} from "@yawn/render-graph-ast";
+
+/** Compiles a plain JavaScript object description into the canonical graph AST. */
+export const graphFromObject = (description) => createGraphAst(description);
+
+/** Small mutable authoring facade; `ast()` returns an immutable canonical AST. */
+export class RenderGraph {
+  #id;
+  #revision;
+  #nodes = [];
+  #render = [];
+  #compute = [];
+
+  constructor(id, revision = 1) {
+    this.#id = id;
+    this.#revision = revision;
+  }
+
+  renderPipeline(declaration) {
+    this.#render.push(structuredClone(declaration));
+    return this;
+  }
+
+  computePipeline(declaration) {
+    this.#compute.push(structuredClone(declaration));
+    return this;
+  }
+
+  node(id, executor, { version = 1, parameters = {}, inputs = {}, state = "enabled" } = {}) {
+    this.#nodes.push({
+      id,
+      state,
+      executor: { key: executor, version },
+      parameters: structuredClone(parameters),
+      inputs: structuredClone(inputs),
+    });
+    return this;
+  }
+
+  ast() {
+    return createGraphAst({
+      id: this.#id,
+      revision: this.#revision,
+      pipelines: { render: this.#render, compute: this.#compute },
+      nodes: this.#nodes,
+    });
+  }
+
+  serialize() {
+    return serializeGraphAst(this.ast());
+  }
+
+  load(core) {
+    return core.compileGraph(this.serialize());
+  }
+}
+
+/** Canonicalizes a JSO/AST and sends its S-expression wire form to Yawn core. */
+export function loadGraph(core, description) {
+  return core.compileGraph(serializeGraphAst(graphFromObject(description)));
+}
+
+export { reference as ref, serializeGraphAst };