Add support for enum in symfony property accessor hydrator

[akalineskou]

We're using enums for some properties, and for the fixtures to work we had to do a workaround because it was trying to set a string.

The workaround was basically to convert the enum value to an enum (which we assume is correct, else it should fail)

    public function setDummyEnum(DummyEnum|string $dummyEnum): void
    {
        if (is_string($dummyEnum)) {
            // alice fixture
            $dummyEnum = DummyEnum::from($dummyEnum);
        }

        $this->dummyEnum = $dummyEnum;
    }

Today I thought enough was enough, we needed a better solution since they were becoming more and more.

I'm not sure if that's where the fix should go, but that's where the exception was happening, so it was a good starting place.

Tested in a big project with no issues.

[theofidry]

👍 LGTM; just a few nitpicks but the core of the code is good IMO