Add barcode-detector-api-polyfill dependency and update environment variable declarations in SvelteKit project

node_modules/@zxing/text-encoding/es2015/coders/utf-16/converCodeUnitToBytes.js

@@ -0,0 +1,18 @@
+/**
+ * @param {number} code_unit
+ * @param {boolean} utf16be
+ * @return {!Array.<number>} bytes
+ */
+export function convertCodeUnitToBytes(code_unit, utf16be) {
+    // 1. Let byte1 be code unit >> 8.
+    const byte1 = code_unit >> 8;
+    // 2. Let byte2 be code unit & 0x00FF.
+    const byte2 = code_unit & 0x00FF;
+    // 3. Then return the bytes in order:
+    // utf-16be flag is set: byte1, then byte2.
+    if (utf16be)
+        return [byte1, byte2];
+    // utf-16be flag is unset: byte2, then byte1.
+    return [byte2, byte1];
+}
+//# sourceMappingURL=converCodeUnitToBytes.js.map