Add musical examples of double-sharp and double-flat usage (#3855)

[JaySoni1]

Fix: #3855 Add musical examples of double-sharp and double-flat usage

I have taken a simple and direct approach following the issue requirements:

1. Added examples of G♯ Major, D♯ Major, and F♭ Major scales showing where double-sharps/flats occur
2. Included the reference to Bartók's Mikrokosmos No. 136 as suggested
3. Added brief explanations of why these notation choices are necessary

Fixes #3855

[github-actions]

✅ All Jest tests passed! This PR is ready to merge.

[JaySoni1]

Hi @pikurasa ,
I have submitted a fix for issue #3855. All tests pass. Please review when possible.
Thanks!

[walterbender]

I think the terminology is too advanced. For example, what are "correct intervallic relationships"? What is "stepwise motion" and why preserve it? What is "enharmonic"?

[JaySoni1]

@walterbender Thank you for the feedback!
You're absolutely right . I will simplify the terminology and make the explanations more beginner-friendly.
-Intervallic relationships refer to the distances between notes.
-Stepwise motion means moving from one note to the next closest note.
-Enharmonic refers to notes that sound the same but are written differently (like G♯ and A♭).

I will revise the description to explain these terms more clearly or replace them with simpler language.
Would you like me to push the updated PR once I make these changes?

[walterbender]

fine to revise this PR

[github-actions]

✅ All Jest tests passed! This PR is ready to merge.

[JaySoni1]

@walterbender I have revised the PR. Please review when you have a moment.
Thank you @walterbender for your guidance !

[walterbender]

Getting closer. Still not sure what phrases like "theoretical clarity" and "logical structure" would mean to our users.

[JaySoni1]

Examples of Double-Sharp and Double-Flat Usage

Double-sharps (𝄪) and double-flats (𝄫) are used in certain keys and advanced compositions to preserve correct scale structure or harmonic context. Here are a few examples:

1. G♯ Major Scale

   • Notes: G♯, A♯, B♯, C♯, D♯, E♯, F𝄪
     -F𝄪 is used instead of G to keep the pattern of moving step by step through the musical alphabet (A to G).

2. D♯ Major Scale

   • Notes: D♯, E♯, F𝄪, G♯, A♯, B♯, C𝄪
   • C𝄪 is written instead of D so that the note names follow the correct sequence and each letter is used only once.

3. F♭ Major Scale

   • Notes: F♭, G♭, A♭, B𝄫, C♭, D♭, E♭
   • B𝄫 is used instead of A to preserve the proper spacing between scale steps.

4. Béla Bartók’s Mikrokosmos No. 136 – "Whole-tone Scale"
   -This piece uses double-flats to keep the note names in the right order, even if some notes sound the same as others.

   • Reference: Mikrokosmos on Wikipedia

I have revised the explanation to make it simpler and more user-friendly.Does this version work better ?
I'm happy to make further changes based on your suggestions.

[walterbender]

This version reads much better. Can you please revise your PR?

[github-actions]

✅ All Jest tests passed! This PR is ready to merge.

[JaySoni1]

@walterbender I have revised the PR. Please review when you have a moment.

[JaySoni1]

@walterbender I noticed that a lint/test error is occur mentioning a missing file MediaBlocks.test.js. Since this doesn't seem related to my changes, I wanted to ask if I should address it or leave it as is. Please let me know how you would prefer I should proceed.