v6: Add sourceProperties to text-based vectorizers

[bevzzz]

It should now be possible to declare properties to include in text2vec-weaviate and text2vec-contextionary vectors.

.vectors(
    Vectorizers.text2vecWeaviate(t2v -> t2v.sourceProperties("firstName", "lastName"));
    Vectorizers.text2vecContextionary(t2v -> t2v.sourceProperties("middleName", "patronymic")));

Secondly, the syntax for adding several vectors to an object does not include a tucked-builder pattern anymore, making it similar to how vector indices are configured (see above).

.vectors(
    Vectors.of("1d", new float[]{...}),
    Vectors.of("2d", new float[][]{...}));

Also wrote Javadoc for methods and classes related to vectors/vectorizers.

[orca-security-eu]

Orca Security Scan Summary

Status	Check	Issues by priority
Passed	Secrets	0   0   0   0	View in Orca