Add url api key config

[codedge]

Currently the URL and API_KEY was read via %env(MEILISEARCH_URL)% in services.xml. This does not fulfill the requirements for a Symfony recipe - see PR.

This PR moves the configuration of url and api_key into the config/meili_search.yml file, and references the env helper %env(MEILISEARCH_URL)% and %env(MEILISEARCH_API_KEY)% in there.

This is a breaking change, as the config now must look like:

meili_search:
  url: '%env(MEILISEARCH_URL)%'
  api_key: '%env(MEILISEARCH_API_KEY)%'
  prefix: '%env(MEILISEARCH_PREFIX)%'
  # Further settings

... see url and api_key.

For existing projects these two keys need to be added to the config manually. When the Symfony recipe is approved thise file will be created automatically and populated with the necessary values.

[curquiza]

Hello @codedge! Sorry for the delay, I was not available at all the previous week :)
I updated this page of our Wiki according to the breaking changes in this PR: https://github.com/meilisearch/meilisearch-symfony/wiki/Index-Configuration

Tell me if my changes are correct for you.
Feel free to update or add any page you want in this wiki of course. If I'm correct, you have the right to do it.

Thanks a lot for this PR!!

[curquiza]

bors merge

[bors]

Build succeeded:

• integration-tests (PHP 7.4)
• integration-tests (PHP 8.0)
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