add new webhook management functionality and email configuration support to the application

[secus217]

This pull request introduces new webhook management functionality and email configuration support to the application, as well as updates to the frontend navigation and dependencies. The changes span environment configuration, database queries, and UI updates to support these new features.

Configuration and Environment Updates:

• Added Mailtrap SMTP email configuration variables to .env.development and .env.example to enable sending emails through Mailtrap, including sender details. [1] [2]
• Added a WEBHOOK_URL variable to .env.example for configuring webhook endpoints.

Database and Backend Support for Webhooks and Password Reset:

• Added multiple new SQLx query files to support CRUD operations for user_webhooks (insert, select, update, delete, and event filtering) and password reset tokens (insert, select, update, delete). These queries enable backend logic for managing webhooks and password reset flows. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15]

Frontend UI and Navigation Enhancements:

• Added a new WebhooksPage to the frontend and integrated it into the protected routes in App.tsx, allowing users to access webhook management from the dashboard. [1] [2]
• Updated the dashboard sidebar navigation to include a new "Webhooks" item with a custom icon, improving discoverability and access to webhook features. [1] [2]
• Minor UI tweak to the sidebar: added extra margin below the logout button for improved spacing.

Dependency Updates:

• Added the lettre crate to Cargo.toml to enable SMTP email sending capabilities in the backend.

[secus217]

add new webhook management functionality and email configuration support to the application