Helpers

Regardless of the way NixVim is used (as a home-manager module, a nixos module, or as a standalone module), helpers can be included in the same way.

You can simply use:

{
    helpers,
    ...
}: {
    # Your config
}

A certain number of helpers are defined that can be useful:

helpers.emptyTable: An empty lua table {} that will be included in the final lua configuration. This is equivalent to {__empty = {};}. This form can allow to do option.__empty = {}.
helpers.mkRaw str: Write the string str as raw lua in the final lua configuration. This is equivalent to {__raw = "lua code";}. This form can allow to do option.__raw = "lua code".
helpers.toLuaObject obj: Create a string representation of the Nix object. Useful to define your own plugins.
helpers.listToUnkeyedAttrs list: Transforms a list to an "unkeyed" attribute set.

This allows to define mixed table/list in lua:
```
  (listToUnkeyedAttrs ["a", "b"]) // {foo = "bar";}
```
Resulting in the following lua:
```
  {"a", "b", [foo] = "bar"}
```
helpers.enableExceptInTests: Evaluates to true, except in mkTestDerivationFromNixvimModule where it evaluates to false. This allows to skip instantiating plugins that can't be run in tests.