Derive Highlighting Notes via Stores

[TomChamberlainUK]

Derive Highlighted Notes via Stores

Add derived stores for Highlighted Notes and Highlighted Chords

Description

Svelte allows stores to be derived from other stores

It would greatly simplify our product if we can shift all logic regarding highlighting notes and fifths to the stores where other components draw from

Notes

• This is a good opportunity to add highlighted chords

Done When

• [ ] Highlighted notes is derived from current mode
• [ ] Highlighted chords is derived from current key