User Registration System - Copy this Html, Bootstrap Component to your project

Create a CRUD system in HTML and Bootstrap, with a PHP backend and MariaDB database, for registering support users. The system should include the following fields: matricula (user's registration number), name (user's full name), unit (user's work unit), phone (phone number), email (email address). The frontend design should be modern and attractive, using styled and responsive Bootstrap elements to make the layout visually appealing on both desktops and mobile devices. The system should include Create, Read, Update, and Delete (CRUD) operations and offer an easy to navigate interface.