feat: Toggle notes list sidebar

[enjeck]

Fixes #1109

[enjeck]

Feedback on current look? @nextcloud/designers

https://github.com/user-attachments/assets/e3b69094-5aab-4763-85e5-66b9f6ddbb91

[JuliaKirschenheuter]

@marcoambrosini, could you please look in it? Thank you!

[marcoambrosini]

Hi @enjeck and @JuliaKirschenheuter, sorry for the late reply. I'm sorry but this is not an acceptable solution from a UX perspective. If the sidebar is collapsed, users would have to go back one level up to folders in order to browse the current one. What we'd need to solve this issue is the ability to navigate multiple levels within the navigation itself, much like settings on iOS and Android.