Improve documentation for context menus, macros, register, and panning blocks (#2403)

[JAK0707]

Improve documentation for context menus, macros, register, and panning blocks (#2403)

Summary

This PR adds detailed documentation for context menus, macros, register, and panning blocks in the Guide.

Changes Introduced

• Context Menus: Added explanation on how to use context menus for block actions.
• Improved Help Strings: Enhanced descriptions and tooltips for better user understanding.
• Macros: Documented the process of creating and using macros for automation.
• Register Block: Explained how it modifies the octave of following notes.
• Panning Block: Added details on controlling stereo sound positioning.

Why This Is Needed

• Improves documentation for better usability.
• Helps users understand and utilize these features effectively.
• Addresses issue Add more documentation for some context menus #2403.

[walterbender]

I am a bit confused. Most of this content is nicely written, but does it belong in the Guide, which is essentially a mash up of MB and Music Theory. Maybe repurpose this text for documentation/README.md?

[JAK0707]

Thank you for the feedback! I appreciate the clarification. Would you prefer that I move this documentation to documentation/README.md instead? I'll be happy to make the necessary changes.

[walterbender]

Yes. I think the general interface documentation belongs in documentation/README.md