Add Spanish translation and update FilamentEditEnv plugin and component

[edeoliv]

Modified English language file. Added Spanish language file. Updated FilamentEditEnvPlugin and ChangeEnvFileComponent to handle default icon.

Icon configuration in ChangeEnvFileComponent

With this modification the FilamentEditEnvPlugin plugin allows you to set a custom icon to be used in the ChangeEnvFileComponent. By default, the icon is heroicon-o-command-line. However, you can customize this icon using the setIcon method.

Example of use

To set a custom icon, use the setIcon method. In the following example, the icon is set to heroicon-o-cube-transparent

FilamentEditEnvPlugin::make()
    ->setIcon(fn () => 'heroicon-o-cube-transparent');