feat(testing): add Bruno script for automated database setup

Add NewDB.sh script that automates the initial database setup process
by running sequential API calls through Bruno CLI to register a user,
create a library, add a library folder, and scan media items.

bruno/NewDB.sh

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+bru run --env Bookhoard --delay 500 "user/auth/Register User.yml" "library/Create Library.yml" "library/Add Library Folder.yml" "scanner/Scan Media Items.yml"