feat: Implement Webview to deplay Terms of use

[fonkamloic]

Problem
Currently, the application does not have an easy and accessible way for users to view the terms of use. This can lead to confusion and mistrust among users and can create legal risks for the company.

Proposed Solution
Implement a webview to display the terms of use within the mobile application. This will provide a clear and accessible way for users to view the terms of use and will also reduce the risk of legal issues.

Steps

• Create a new screen within the application for displaying the terms of use.
• Use the webview_flutter package to add a webview to the screen.
• In the webview, load the terms of use webpage.
• Add a button to the screen that allows the user to accept the terms of use.
• Once the user accepts the terms of use, store this information in the device's local storage or in the backend.
• Test the webview on multiple devices to ensure compatibility and proper functionality.

Additional considerations
Ensure that the terms of use page is loaded securely and that it is up-to-date.
Add an option for the user to view the terms of use at any time from the settings or profile page.
Consider adding a language option to the terms of use page.