feat: add MetaMask and Dynamic SDK integration guide

[cxalem]

Introduces a new documentation file for integrating MetaMask SDK with Dynamic SDK in a Next.js application. The guide covers project setup, configuration, and usage examples, including wallet connection and status checks. It also outlines project structure and troubleshooting tips.

Description

Changes

• Added a new section in the "Set up the project" part of the documentation
• Introduced two setup options:
  1. Cloning the repository directly from GitHub
  2. The existing manual setup process
• Maintained consistent formatting and style with the rest of the document

Why

This change improves the developer experience by:

• Providing a quick-start option for developers who want to get started immediately
• Offering flexibility in how developers can begin working with the MetaMask + Dynamic SDK integration
• Making the documentation more accessible to developers with different preferences

Testing

• Verified that the documentation formatting is consistent
• Confirmed that the repository URL is correct and accessible
• Ensured the installation commands are accurate

Related Links

• Repository: https://github.com/MetaMask/metamask-dynamic

Issue(s) fixed

Fixes #

Preview

Checklist

Complete this checklist before merging your PR:

• If this PR contains a major change to the documentation content, I have added an entry to the top of the "What's new?" page.
• The proposed changes have been reviewed and approved by a member of the documentation team.

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Name	Status	Preview	Comments	Updated (UTC)
metamask-docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Apr 11, 2025 5:31pm

[bgravenorst]

lgtm