Proposal: Switch to relative imports

Right now, every file is mapped via the `jsconfig.json` and the import map in `editor.hmtl`, so for each new file a new entry is needed.
+ Leads to bigger files, to save entries
+ Leads to merge conflicts as these files tend to be shared across branches

But relative imports on the other hand can get pretty big and ugly -> define a view base paths, like @sidebar/*, @editor/* etc and use relative imports from there _(our Js code is propably not structured enough for this)_

Start by reading jsconfig.json and the import map in editor.hmtl, then inspect how current JavaScript imports are organized. Determine whether a consistent view-base-path structure is feasible and document the agreed import approach and affected files as done.

Written by the indexing model from the issue text.