[Feature request] Add support for Metadata API

[yoanbernabeu]

I think it would be interesting to add support for AirTable's Metadata API (https://airtable.com/api/meta) to allow users to simply retrieve information from their database.

The use could be something like that :

public function bar(AirtableClientInterface $airtableClient)
    {
        $tables = $airtableClient->getTables();

        $views =  $airtableClient->getViewsFromOneTable('Foo');

        $fields =  $airtableClient->getFieldsFromOneTable('Bar');

    // ...
}