Add Algolia provider factory

[markomitranic]

This PR was made because i noticed a discrepancy between geocoder-php/Geocoder listed provider support and here. The same effort was done as part of #207 but it remained unfinished for more than a year. I fixed the option names as requested in CR from @tgalopin and @Nyholm on the #207.

[norkunas]

@Nyholm please, when you'll have time check what's going on with github actions, why the status isn't reported :)

[Nyholm]

Thank you.

Could you rebase on master and also add a small test for this provider?

[markomitranic]

Thank you.

Could you rebase on master and also add a small test for this provider?

On it, btw CS fixer seems to be failing unrelated to the actual code it parses.

[Nyholm]

Thank you.

I still miss a test.
Also, CI complained about your AlgoliaFactory.php. I made a small comment to highlight that.

[markomitranic]

Thank you.

I still miss a test.
Also, CI complained about your AlgoliaFactory.php. I made a small comment to highlight that.

@Nyholm
Thanks for the explanation, i didn't see the minus in the report at first :/

Test config added, line removed :)

[Nyholm]

Thank you