Binders for deathbeds friends & family night

Status	Demo	Note
MVP		Click here, probably.
WIP		Abandon hope, all ye who enter.

Status	Demo	Note
MVP		Click here, probably.
WIP		Abandon hope, all ye who enter.

Unreleased packages and features

if configured, is currently returing a basically empty ServerCapabilities so I must be missing something... but should be something like this, added to jupyter_notebook_config.json:

  "LanguageServerManager": {
    "language_servers": {
      "julia-languageserver": {
        "version": 3,
        "argv": ["julia", "--debug=yes", "--project=.", "-e", "using LanguageServer, LanguageServer.SymbolServer; runserver()", "."],
        "languages": ["julia"],
        "display_name": "LanguageServer.jl",
        "mimetypes": ["text/julia", "text/x-julia"]
      }
    }
  }