Add custom cursor packs and harden native postinstall builds

scripts/postinstall.mjs

@@ -0,0 +1,53 @@
+import { spawnSync } from "node:child_process";
+
+const npmExecPath = process.env.npm_execpath;
+const hasNpmExecPath = typeof npmExecPath === "string" && npmExecPath.length > 0;
+const npmInvoker = hasNpmExecPath
+	? {
+			command: process.execPath,
+			argsPrefix: [npmExecPath],
+			shell: false,
+		}
+	: {
+			command: process.platform === "win32" ? "npm.cmd" : "npm",
+			argsPrefix: [],
+			shell: process.platform === "win32",
+		};
+
+function runScript(scriptName) {
+	console.log(`[postinstall] Running npm script: ${scriptName}`);
+	const result = spawnSync(npmInvoker.command, [...npmInvoker.argsPrefix, "run", scriptName], {
+		stdio: "inherit",
+		env: process.env,
+		shell: npmInvoker.shell,
+	});
+
+	if (result.error) {
+		console.error(
+			`[postinstall] Failed to start "${scriptName}" (${result.error.message}).`,
+		);
+		return false;
+	}
+
+	if (result.signal) {
+		console.error(`[postinstall] "${scriptName}" was terminated by signal ${result.signal}.`);
+		return false;
+	}
+
+	if (result.status !== 0) {
+		console.error(
+			`[postinstall] "${scriptName}" exited with code ${result.status}.`,
+		);
+		return false;
+	}
+
+	return true;
+}
+
+if (!runScript("rebuild:native")) {
+	process.exit(1);
+}
+
+if (!runScript("build:platform-native-helpers")) {
+	process.exit(1);
+}