Add Chromium-only Blender WebEngine parity work

tools/web/update-engine-manifest.mjs

@@ -0,0 +1,12 @@
+import fs from "node:fs";
+
+const [manifestPath, wasmHash] = process.argv.slice(2);
+if (!manifestPath || !/^[a-f0-9]{64}$/.test(wasmHash ?? "")) {
+  throw new Error("usage: update-engine-manifest.mjs <manifest.json> <wasm-sha256>");
+}
+
+const manifest = JSON.parse(fs.readFileSync(manifestPath, "utf8"));
+const resource = manifest.wasm?.find((entry) => entry.id === "web-engine-bootstrap");
+if (!resource) throw new Error("web-engine-bootstrap resource is missing from the engine manifest");
+resource.sha256 = wasmHash;
+fs.writeFileSync(manifestPath, `${JSON.stringify(manifest, null, 2)}\n`);