Enhanced Documentation

[Ubayed-Bin-Sufian]

Summary:

This PR enhances the documentation of Music Blocks to improve usability, readability, and alignment with the latest version of the platform. It is a follow-up of #4069.

Changes introduced:

• Add Table of Contents: Organize navigation for better accessibility.
• Add Headers: Structure content with clear headings for each section.
• Include Live Links for Examples: Add clickable links to provide interactive examples.
• Fix Typos: Correct grammatical errors and inconsistencies.
• Optimize Formatting: Remove unnecessary spaces and update images for improved alignment and readability.
• Update Guide: Refine guide/guide.html up to section 3.2.3 to ensure consistency with the guide/README.md.

Checklist:

• My changes adhere to the project's contribution guidelines.
• Tested all live links to ensure they are operational and relevant.
• Verified that the table of contents is navigable and functional.
• Ensured that images and diagrams are clear and appropriately labeled.

[Ubayed-Bin-Sufian]

@walterbender Please have a review of the PR. I have edited the documentation according to the meeting.