Add support for login_hint parameter

[cicnavi]

No description provided.

[cicnavi]

This is to resolve #89

[codecov]

Codecov Report

❌ Patch coverage is 54.83871% with 14 lines in your changes missing coverage. Please review.
✅ Project coverage is 55.92%. Comparing base (c012108) to head (1f7dbfe).

Files with missing lines	Patch %	Lines
src/Server/Grants/AuthCodeGrant.php	0.00%	5 Missing ⚠️
src/Server/RequestTypes/AuthorizationRequest.php	0.00%	4 Missing ⚠️
src/Server/Grants/ImplicitGrant.php	0.00%	3 Missing ⚠️
src/Factories/RequestRulesManagerFactory.php	0.00%	1 Missing ⚠️
src/Services/AuthenticationService.php	83.33%	1 Missing ⚠️

Additional details and impacted files

@@                 Coverage Diff                 @@
##             wip-version-7     #351      +/-   ##
===================================================
+ Coverage            55.55%   55.92%   +0.36%     
- Complexity            2625     2633       +8     
===================================================
  Files                  182      183       +1     
  Lines                10379    10409      +30     
===================================================
+ Hits                  5766     5821      +55     
+ Misses                4613     4588      -25     

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