Support parsing and retrieving SolutionGuid

[icnocop]

📫 Addressed Issue(s)

Closes #23

📄 Description

Supports parsing and retrieving the SolutionGuid

✅ Checks

• My PR adheres to the general code-style of this project (look at other code if you're unsure)
• My code requires changes to the documentation
• I have updated the documentation as required
• All the automated tests have passed

ℹ Additional Information

[wgnf]

Thank you Rami for the great additions here. I love the new component which can provide the contents of a given global-section. And the introduction of a test, which checks if parsing an empty file works.

There are just somet things that I would need you to change, before I would merge this PR.

[wgnf]

Thank you Rami for these great additions! They just helped this library immensely 🚀

[wgnf]

Included in version 3.0.0 that has just been released (also see https://github.com/wgnf/SlnParser/releases/tag/v3.0.0). Thanks a lot @icnocop!

[icnocop]

Thank you Martin for continuing to support this awesome library, providing valuable feedback in code reviews, accepting my contributions, and releasing a new version so quickly. ❤

[wgnf]

Haha thanks :)
For appreciating my work and investing the time to help this small library out :)