add union object normalizer

[DavidBadura]

No description provided.

[github-actions]

Hello 👋

here is the most recent benchmark result:

HydratorBench
=============

+-------------------------------+------------------+------------------+-----------------+------------+
|                               | time (kde mode)                     | memory                       |
+-------------------------------+------------------+------------------+-----------------+------------+
| subject                       | Tag: <current>   | Tag: base        | Tag: <current>  | Tag: base  |
+-------------------------------+------------------+------------------+-----------------+------------+
| benchHydrate1Object ()        | 2.500μs (±0.00%) | 2.500μs (±0.00%) | 4.759mb         | 4.759mb    |
| benchExtract1Object ()        | 2.800μs (±0.00%) | 2.600μs (±0.00%) | 4.759mb         | 4.759mb    |
| benchHydrate1000Objects ()    | 2.093ms (±0.00%) | 2.097ms (±0.00%) | 4.759mb         | 4.759mb    |
| benchExtract1000Objects ()    | 1.800ms (±0.00%) | 1.793ms (±0.00%) | 4.759mb         | 4.759mb    |
| benchHydrate1000000Objects () | 2.064s (±0.00%)  | 2.121s (±0.00%)  | 4.760mb         | 4.760mb    |
| benchExtract1000000Objects () | 1.692s (±0.00%)  | 1.688s (±0.00%)  | 4.760mb         | 4.760mb    |
+-------------------------------+------------------+------------------+-----------------+------------+

This comment gets update everytime a new commit comes in!

[DanielBadura]

Feature itself LGTM.

Just thinking about instead of passing an array to the UnionObjectNormalizer leveraging the #[NormalizedName] Attribute or something like that. But also that is kina weird, since it does not really bring any value itself.

[DanielBadura]

it's not the type but instead the type key right?