Created Golang category and basic hello,world snippet

[AmeerMoustafa]

Description

Created a Golang section and added a basic hello world snippet with comments.

Type of Change

* [x]  ✨ New snippet

* [ ]  🛠 Improvement to an existing snippet

* [ ]  🐞 Bug fix

* [ ]  📖 Documentation update

* [ ]  🔧 Other (please describe):

Checklist

* [x]  I have tested my code and verified it works as expected.

* [x]  My code follows the style and contribution guidelines of this project.

* [x]  Comments are added where necessary for clarity.

* [ ]  Documentation has been updated (if applicable).

* [x]  There are no new warnings or errors from my changes.

[Mathys-Gasnier]

Thanks for the contribution, I notice that only one snippet has been added, we don't accept new language unless their author provides at least one or two snippets more than the hello world one.

[Mathys-Gasnier]

I think this snippet has too much comments, also the tags of a snippet shouldn't include the name of the language it's using

[AmeerMoustafa]

No worries, I will add some more snippets and remove some comments. Added them since technically this is the "basics" section, so I assumed that people would not already be familiar with the language.