[3.x] Reconceptualize service DTO to config.

[r-kujawa]

What does this PR do? 🤖

It didn't make sense that the \Payavel\Orchestration\Service::class had a$service property which solely held it's configurations. So this PR changes that by utilizing a new Fluent, ServiceConfig:class to hold those configurations.

Any background context you would like to provide? 🚧

Pointing at 3.x because it contains breaking changes, and the elimination of the Serviceable contract.

Does this relate to any issue? 🔗

Closes #73

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 96.94656% with 4 lines in your changes missing coverage. Please review.

Project coverage is 93.09%. Comparing base (81a3da2) to head (6d15510).

Files	Patch %	Lines
src/Drivers/ConfigDriver.php	97.14%	1 Missing ⚠️
src/Drivers/DatabaseDriver.php	95.65%	1 Missing ⚠️
src/Service.php	83.33%	1 Missing ⚠️
src/ServiceDriver.php	66.66%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master      #79      +/-   ##
============================================
+ Coverage     92.94%   93.09%   +0.15%     
+ Complexity      193      190       -3     
============================================
  Files            23       22       -1     
  Lines           680      666      -14     
============================================
- Hits            632      620      -12     
+ Misses           48       46       -2     

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