feat: add fflate library for file decompression and implement file download functionality in BookOfflineButton component

pnpm-lock.yaml

@@ -63,6 +63,9 @@ importers:
       clsx:
         specifier: ^2.1.1
         version: 2.1.1
+      fflate:
+        specifier: ^0.8.2
+        version: 0.8.2
       framer-motion:
         specifier: ^12.23.24
         version: 12.23.24(@emotion/is-prop-valid@0.8.8)(react-dom@19.2.0(react@19.2.0))(react@19.2.0)
@@ -1895,6 +1898,9 @@ packages:
       picomatch:
         optional: true
 
+  fflate@0.8.2:
+    resolution: {integrity: sha512-cPJU47OaAoCbg0pBvzsgpTPhmhqI5eJjh/JIu8tPj5q+T7iLvW/JAYUqmE7KOB4R1ZyEhzBaIQpQpardBF5z8A==}
+
   file-entry-cache@6.0.1:
     resolution: {integrity: sha512-7Gps/XWymbLk2QLYK4NzpMOrYjMhdIxXuIvy2QBsLE6ljuodKvdkWs/cpyJJ3CVIVpH0Oi1Hvg1ovbMzLdFBBg==}
     engines: {node: ^10.12.0 || >=12.0.0}
@@ -4977,6 +4983,8 @@ snapshots:
     optionalDependencies:
       picomatch: 4.0.3
 
+  fflate@0.8.2: {}
+
   file-entry-cache@6.0.1:
     dependencies:
       flat-cache: 3.2.0