Add Windows support for creating search adapters

[zoglo]

Another try but now in the right repo :)

Description

Absolute paths on windows fail due to an undefined array key within the following line not having a scheme at all;
https://github.com/schranz-search/schranz-search/blob/d91446a972b7bcc894abfd803eff40fc7dd3c09c/packages/seal/src/Adapter/AdapterFactory.php#L140

This PR adds Windows support for the path resolution since $dsn would fail later due to the second parse_url attempt returning false again.

In my case, the following $dsn would fail because it won't detect any scheme at all:
loupe://C:\path\project\var\indexes
The early return is done before adding the fallback where it adds the adapter name with an `@´ :')

Unsure if we should go for the PHP_OS_FAMILY check and see if it's windows in this case 🤔?

[zoglo]

See 085fc7e
I left the explanation here: #452 (comment)

[alexander-schranz]

@zoglo did refactor it to rawurlencode the part and decode it later, as I stumbled over other issues in the later process. I'm not sure about the detection based on DIRECTORY_PATH or OS as may the "build" system for containers may a different as where being hosted. So I did manually detection by check if it starts with <letter>:\ this also let us test it in the Linux CI. With the new AdapterFactoryTest it should now be a lot easier to add more tests cases and avoid regressions here.

Thx for your work on this. Let me know if you stumble over more issues.