feat(readarr): fetch Readarr book files and expose them on the CLI

src/cli/readarr/list_command_handler.rs

@@ -37,6 +37,15 @@ pub enum ReadarrListCommand {
     )]
     book_id: i64,
   },
+  #[command(about = "List all book files for the book with the given ID")]
+  BookFiles {
+    #[arg(
+      long,
+      help = "The Readarr ID of the book whose book files you want to list",
+      required = true
+    )]
+    book_id: i64,
+  },
   #[command(about = "List all books for the author with the given ID")]
   Books {
     #[arg(
@@ -122,6 +131,13 @@ impl<'a, 'b> CliCommandHandler<'a, 'b, ReadarrListCommand> for ReadarrListComman
           .await?;
         serde_json::to_string_pretty(&resp)?
       }
+      ReadarrListCommand::BookFiles { book_id } => {
+        let resp = self
+          .network
+          .handle_network_event(ReadarrEvent::GetBookFiles(book_id).into())
+          .await?;
+        serde_json::to_string_pretty(&resp)?
+      }
       ReadarrListCommand::Books { author_id } => {
         let resp = self
           .network