Feature request: Autocomplete

[stefnotch]

This is a feature request for the far future: Autocompleting!

It would probably be implemented by taking a Python language server such as

• https://github.com/python-lsp/python-lsp-server
• https://github.com/microsoft/pyright

and then somehow connecting it to the editor

• https://github.com/TypeFox/monaco-languageclient
• https://github.com/marc2332/lsp-codemirror
• https://github.com/FurqanSoftware/codemirror-languageserver/