Add support to use array in controller param in config

[viktorruskai]

Summary

• This PR contains a small feature where you can use an array in the config file. It will help your IDE navigate to the method you are using.

return [
    'route' => [
        // The prefix for routes; do NOT use a leading slash!
        'prefix' => 'graphql',

        //  Normal format: 
        // 'controller' => GraphQLController::class . '@query',

        // Array format:
        'controller' => [GraphQLController::class, 'query'],
        ...

        'graphiql' => [
               'controller' => [GraphQLController::class, 'graphiql'],
               ...
        ],
        ...

• In your IDE it should look like this:

---

Type of change:

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update
• Misc. change (internal, infrastructure, maintenance, etc.)

Checklist:

• Existing tests have been adapted and/or new tests have been added
• Add a CHANGELOG.md entry
• Update the README.md
• Code style has been fixed via composer fix-style

[viktorruskai]

@mfn I updated the Pull request.

[mfn]

LGTM!

Can you please:

• work in my feedback
• add an example for array syntax in the config itself, .e. g

          // The controller/method to use in GraphQL request.
          // Also supported array syntax: `[\Rebing\GraphQL\GraphQLController::class, 'query']`
          'controller' => \Rebing\GraphQL\GraphQLController::class . '@query',
  

• resolve the conflicts with master?

After that, I'm happy to merge the PR!

[mfn]

Suggested change

	replace the existing one. (also supports `array` format)
	replace the existing one (also supports `array` format).

[viktorruskai]

@mfn I implemented everything you mentioned.

[mfn]

I guess we've to run composer phpstan-baseline to update the baseline; not sure what the appropriate code/phpdoc fix would be and I would be fine adding it to the baseline.

(note: I generated it locally but I can't push to your branch)

[viktorruskai]

@mfn Yeah, sure ... I updated the baseline. Also, I tried to set proper PHPDoc with PHPStan Array Shape, but unsuccessfully.

[mfn]

@viktorruskai thanks!

Unfortunately the baseline needs to be generated with the same PHP version running on GHA, which is 8.1 and not 7.4

I fixed this with #916 , which included your PR 🎉

Thanks for your contribution!