handle bookmarks/files

[serapath]

@todo

• bookmark internal/external files
• load and cache external files into browser storage (automatically/when clicked)
• create new file/folder
• rename/delete/move the file
• bookmark a file (save it)
• browse files or folders
• send/export (download to computer, upload to swarm, share to github, create gist, share via local network (from coworker), share link on social media, send to a person)
  • #83 import/exports/sync user data (dat/git/...)
• receive/import (from computer, from swarm/github, get through local network)

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