docs(tutorial): Tokens - SIP-010 Fungible Token Implementation

[jadonamite]

Description

This PR adds Module 16: Token Standards by @jadonamite. It covers the creation of a SIP-010 compliant fungible token with administrative minting and user burning capabilities.

Content Overview

• Standard Interface: Implementing the 7 mandatory SIP-010 functions.
• Supply Management: Using ft-mint? and ft-burn?.
• Permissions: Securing the mint function against unauthorized access.

Checklist

• Contract validated against standard SIP-010 traits.
• Permissions logic tested.
• Formatting follows the repository's style guide.

Related Issues

Closes # (If applicable)