feat: add built-in backup decryption

src/lib/hash.ts

@@ -0,0 +1,13 @@
+// https://stackoverflow.com/a/7616484
+export const hashString = (str: string) => {
+  let hash = 0,
+    i,
+    chr;
+  if (str.length === 0) return hash;
+  for (i = 0; i < str.length; i++) {
+    chr = str.charCodeAt(i);
+    hash = (hash << 5) - hash + chr;
+    hash |= 0; // Convert to 32bit integer
+  }
+  return hash;
+};