I am well-prepared to undertake the development of a FilamentPHP v3 (Laravel 10) project with two-level multi-tenancy permission configuration using the Spatie Permission package. With a clear understanding of your database structure - PLAN > STORE > USER > ROLE > PERMISSION - and the nuanced permissions setup you require, I am confident in my ability to deliver a robust solution. I will ensure that each user can have access to multiple stores, with the flexibility for different roles within each store. Moreover, I will implement an intuitive panel for managing permissions for every user within each team, mirroring the functionality of the Teams package. Despite its limitations, I will ensure that the panel provides a seamless experience for managing permissions effectively. For ease of use and testing, I will configure the project to utilize SQLite as the database. I am committed to delivering a comprehensive solution that meets all your requirements and exceeds your expectations. I look forward to the opportunity to demonstrate my skills and provide you with a high-quality project.