zsh: add option to disable history config in zshrc

[in-a-dil-emma]

Description

I have my history settings set via the NixOS module and I don't want to set those again for home-manager.

I admit this is a very specific usecase.

I'm open to suggestions on how to name that new option. I'm unsure myself.

Checklist

• Change is backwards compatible.

• Code formatted with nix fmt or
  nix-shell -p treefmt nixfmt deadnix keep-sorted --run treefmt.

• Code tested through nix run .#tests -- test-all or
  nix-shell --pure tests -A run.all.

• Test cases updated/added. See example.

• Commit messages are formatted like

  {component}: {description}
  
  {long description}
  

  See CONTRIBUTING for more information and recent commit messages for examples.

• If this PR adds a new module

  • Added myself as module maintainer. See example.
  • Generate a news entry. See News
  • Basic tests added. See Tests

• If this PR adds an exciting new feature or contains a breaking change.

  • Generate a news entry. See News

[ambroisie]

Not a huge fan of enableConfig, but I can see that history.enable might lead a user to believe it would disable the history feature entirely, rather than just not configure it.