feat/form serialization

[SilasKenneth]

• Initital code for form serialization.
• Add implementations for different methods.
• More implementations and tests.
• Do refactor to urlencode keys and values.

[sonarqubecloud]

Quality Gate passed

Issues
19 New issues
0 Accepted issues

Measures
0 Security Hotspots
82.2% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[baywet]

@SilasKenneth can you also PR kiota to:

1. add an entry to the changelog
2. add this serialization provider to the default ones in PHP (refiner)
3. add this dependency in the appsettings under PHP

Thanks!

[SilasKenneth]

Hi @baywet ,the package isn't available of packagist yet, once there I'll add a dependency.