Add proper license

scripts/ensure-license-headers.ts

@@ -0,0 +1,42 @@
+import * as fs from 'fs';
+import * as path from 'path';
+import { fileURLToPath } from 'url';
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+
+const LICENSE_HEADER = `/*
+ * Copyright (c) 2025-present, Vanilagy and contributors
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */`;
+
+const missingFiles: string[] = [];
+
+const checkFile = (filePath: string) => {
+	const content = fs.readFileSync(filePath, 'utf8');
+	if (!content.startsWith(LICENSE_HEADER)) {
+		missingFiles.push(filePath);
+	}
+};
+
+const checkDirectory = (dirPath: string) => {
+	const entries = fs.readdirSync(dirPath, { withFileTypes: true });
+	for (const entry of entries) {
+		const fullPath = path.join(dirPath, entry.name);
+		if (entry.isDirectory()) {
+			checkDirectory(fullPath);
+		} else if (entry.name.endsWith('.ts')) {
+			checkFile(fullPath);
+		}
+	}
+};
+
+checkDirectory(path.join(__dirname, '..', 'src'));
+
+if (missingFiles.length > 0) {
+	console.error('Files missing license header:');
+	missingFiles.forEach(file => console.error(`  ${file}`));
+	process.exit(1);
+}