refactor: split `Document` into `TextDocument` and `VectorDocument`

[chr-hertel]

Based on

• 95

• 101

Goal

TextDocument and VectorDocument - both have an UUID and Metadata

/**
 * @param TextDocument|TextDocument[] $documents
 */
DocumentEmbedder::create(TextDocument|array $documents, ...): void

// only converting than

$vectorDocuments[] = new VectorDocument($vectors[$i], $document->id, $document->metadata);

// and drop text in store context completely

/**
 * @param VectorDocument|VectorDocument[] $documents
 **/
StoreInterface::add(VectorDocument ...$documents): void;

/**
 * @return VectorDocument[]
 */
VectorStoreInterface::query(Vector $vector, array $options = []): array;

[OskarStark]

I like this PR

[chr-hertel]

from my side ready to merge - any final thoughts?