This package adds completion scripts for `gradle` on the `bash` and
`zsh` shells.
The completions can be enabled like this:
```
{ pkgs, ... }:
{
environment.systemPackages = [ pkgs.gradle pkgs.gradle-completion ];
programs.zsh.enable = true;
}
```
The package stores the scripts into the expected directories in
`$out/share` to ensure that the shells can easily find their scripts.
Closes#42799
