Add option to create index it it does not exist

[krvajal]

Currently you need to create the index first in the Algolia dashboard for this plugin to work. I would be nice if this plugin could create the index for me it the specified index does not exists yet.

[Haroenv]

Ah, that's interesting behaviour, it must have regressed in a recent version, since originally the plugin made the index. If you're feeling adventurous, any operation, like doing an empty "setSettings" creates an index.

[krvajal]

I will give it a try, thx