Allow home-manager to specify a custom package for the cli

[joshuata]

Overview

Adds a nix homemanager option to explicitly specify the nix package to use. This allows them to pin to a specific version or provide a beta version.

Type of change

• Created a new plugin
• Improved an existing plugin
• Fixed a bug in an existing plugin
• Improved contributor utilities or experience

Related Issue(s)

• Resolves: Support beta cli versions in nix/home-manager #514
• Relates: #

How To Test

Run home-manager supplying a custom package such as modifying the _1password-cli to point to the beta version.

Changelog

Nix users can now pass a custom cli package to the nixos/homemanager config.

[github-actions]

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