feat: add initial runtime-executor prototype

frontend/src/lib/node-registry.ts

@@ -0,0 +1,45 @@
+import type { NodeRegistry, NodeType } from "./types";
+
+const nodeTypes: NodeType[] = [
+  {
+    id: "input/float",
+    inputs: {
+      "value": { type: "float", value: 0.1, internal: true },
+    },
+    outputs: ["float"],
+    execute: ({ value }) => { return value }
+  },
+  {
+    id: "math",
+    inputs: {
+      "type": { type: "select", options: ["add", "subtract", "multiply", "divide"], internal: true, value: "multiply" },
+      "a": { type: "float", value: 2 },
+      "b": { type: "float", value: 2 },
+    },
+    outputs: ["float"],
+    execute: (inputs) => {
+      const a = inputs.a as number;
+      const b = inputs.b as number;
+      switch (inputs.type) {
+        case "add": return a + b;
+        case "subtract": return a - b;
+        case "multiply": return a * b;
+        case "divide": return a / b;
+      }
+    }
+  },
+  {
+    id: "output",
+    inputs: {
+      "input": { type: "float" },
+    },
+    outputs: [],
+  }
+]
+
+export class MemoryNodeRegistry implements NodeRegistry {
+  getNode(id: string): NodeType | undefined {
+    return nodeTypes.find((nodeType) => nodeType.id === id);
+  }
+}
+