feat: Add scroll component

[oliverroick]

• Add ScrollTracker component, which tracks scrolling events in the sidebar and updates the browser location
• Adds action:parseAreaSection, which handles changes to the location hash, and will later be extended to show and hide relevant layers on the map
• Clean up layer configurations

[vgeorge]

@oliverroick I believe this is pointing to the right direction. We might need to create new states for each area section and apply styles when entering/exiting then, avoiding doing a area refetch when it doesn't change.

[vgeorge]

@oliverroick I added a new branch scrolly-vg with a refactored approach based on your work. The main difference is that we avoid using a "submachine" to handle the different area view types, which would make it harder to observe URL changes and identify where the map effects should be applied. The diagram looks like this now:

Please note I haven't added the map side effects of state changes yet, but it should be less involved to add them now.

[vgeorge]

@oliverroick I merged our latest changes from scrolly-vg and:

• Fixed area reset when moving from area view to world view or different area view
• Lint and type issues

I believe this is working well and can serve as a foundation for the other PRs that introduce the section diagrams, so I'll go ahead and merge it.