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

node_modules/@zxing/text-encoding/esm/common/TextEncoder.d.ts

@@ -0,0 +1,27 @@
+declare type TextEncoderOptions = {
+    NONSTANDARD_allowLegacyEncoding?: boolean;
+    fatal?: boolean;
+};
+declare type EncodeOptions = {
+    stream?: boolean;
+};
+/**
+ * @constructor
+ * @param {string=} label The label of the encoding. NONSTANDARD.
+ * @param {Object=} options NONSTANDARD.
+ */
+export declare class TextEncoder {
+    private _encoding;
+    private _encoder;
+    private _do_not_flush;
+    private _fatal;
+    constructor(label?: string, options?: TextEncoderOptions);
+    get encoding(): string;
+    /**
+     * @param {string=} opt_string The string to encode.
+     * @param {Object=} options
+     * @return {!Uint8Array} Encoded bytes, as a Uint8Array.
+     */
+    encode(opt_string: string, options?: EncodeOptions): Uint8Array;
+}
+export {};