Do initial processing in the background

[ZNielsen]

When opening large files, the initial file scanning causes a long delay before content is displayed. This ticket is to investigate kicking that work off in an external process, then handling the result whenever it's ready. This will cause the minimap to "pop in", but that's better than blocking the open.

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[ZNielsen]

Bump, I think I'm going to try to do this in pieces.

Feature Todos:

• Check if on a supported version with the background setting enabled
  • For initial stab, only neovim, not vim
  • code-minimap of a particular version?
• Spawn the process to do the hard work
  • Initially, just scanning for the longest line
  • May want to move git stuff into there as well
  • What will actually be doing this work?
  • Start with a shell script
  • Investigate if code-minimap can be extended to do this?
• Catch the callback
  • Don't get any data on_exit, so will need to ensure we send it on stdin before exiting.
  • Possible flushing issue called out in the docs, will need to ensure we force flush
• Update internal structures and update minimap

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[ZNielsen]

• [x] The :Files command is causing issues
• [x] Opening a new file behaves weird

[ZNielsen]

Fixed new file and :Files command by updating code-minimap.