[Feature] Implement createIndex method for engine

[matchish]

Laravel scout have scout:index command that not implemented here

Describe the solution you'd like
Have to create index from index name and ignore index key. If there are settings and mappings for the index name they have to be applied. Otherwise default have to be applied

Context
#46 (comment)

Take a look how to instantiate an index

laravel-scout-elasticsearch/src/ElasticSearch/Index.php

Line 87 in e545cde

public static function fromSource(ImportSource $source): Index

Here how to store the index

laravel-scout-elasticsearch/src/Jobs/Stages/CreateWriteIndex.php

Line 36 in e545cde

public function handle(Client $elasticsearch): void

Also consider to check by alias if the index exists already before create new one. If the index exists already the method have to fail.