zsh: add programs.zsh.autosuggestions.strategy option

[JohnRTitor]

Description

zsh: add programs.zsh.autosuggestions.strategy option like in nixpkgs. The option defaults to history.

Checklist

• [x] Change is backwards compatible.

• [ ] Code formatted with ./format.

• [ ] Code tested through nix-shell --pure tests -A run.all or nix develop --ignore-environment .#all using Flakes.

• [ ] 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.

Maintainer CC

[JohnRTitor]

The eval is failing? Not sure why, though.

EDIT: Ahhh?

       error: function 'mkOption' called with unexpected argument 'strategy'
       at /nix/store/asymc3nsl739p1wwr0w6xbjnqs3qb94p-source/lib/options.nix:67:5:
           66|   mkOption =
           67|     {

[JohnRTitor]

@rycee I think this is ready for review. Please check. Thanks