feat: implement resource index decryption

- Add `cipher` utility for resource index decryption/encryption
- Automatically decrypt `index_initial.json` and `index_main.json` during archiving
- pages: Update `ResourcesTab` to display links to decrypted versions of index files
- Update README to reflect that some raw data is now decrypted

src/utils/config.ts

@@ -12,6 +12,11 @@ type AllRequired<T> = Required<{
 
 type ConfigType = AllRequired<
   Freeze<{
+    cipher: {
+      akEndfield: {
+        resIndexKey: string;
+      };
+    };
     network: {
       api: {
         akEndfield: {
@@ -69,6 +74,11 @@ type ConfigType = AllRequired<
 >;
 
 const initialConfig: ConfigType = {
+  cipher: {
+    akEndfield: {
+      resIndexKey: 'Assets/Beyond/DynamicAssets/Gameplay/UI/Fonts/', // via reversing
+    },
+  },
   network: {
     api: {
       akEndfield: {