Add functionality for offloading specific instances

[OpenBagTwo]

Summary

Addresses #123

List of Changes

• Pre-commit bump and auto-lint
• $enderchest break [instance names...] will:
  1. check if the specified instances are registered to the chest (case sensitive)
  2. replace symlinks into the EnderChest folder from those instances with file copies
  3. deregister those instances from the chest

Tech Debt and Other Concerns

Not tech debt, but just wanted to note that this is the only action—besides test—that does not accept the Minecraft root as a positional argument (though the --root root flag still works), as it was too confusing trying to disambiguate the root from instance names. This is technically breaking backwards compatibility... but only for people who had previously fully uninstalled EnderChest.

Validation Performed

• I have run this command to take an instance that was previously registered to EnderChest and verified that, post break, all the files were still in place, and the instance was still launchable / playable as before

PR Type

• This PR introduces a breaking change (will
  require a bump in the minor version)
• The changes in this PR are high urgency and necessitate a hotfix or patch
  release (will require rebasing off of release)
• This is a release (staging) PR (maintainer use only)

Checklist:

• I have read the contributor's guide
• I have run mkdocs serve locally and ensured that all API docs and
  changes I have made to the static pages are rendering correctly, with all links
  working
• All tech debt concerns have been resolved, documented as issues, or otherwise
  accepted
• I agree to license my contribution to this project under
  the GNU Public License v3

[OpenBagTwo]

This is the last piece of functionality for the v0.1.6, so once this PR is merged, it'll be time for a release candidate!