Add Go skill tree to Guided Learning section

We want to ensure high quality of the packages. Make sure that you've checked the boxes below before sending a pull request.

[x] I have read the Contribution Guidelines
[x] I have read the Maintainers Note
[x] I have read the Quality Standards

Not every repository (project) will require every option, but most projects should. Check the Contribution Guidelines for details.

[ ] The repo documentation has a pkg.go.dev link.
[ ] The repo documentation has a coverage service link.
[ ] The repo documentation has a goreportcard link.
[ ] The repo has a version-numbered release and a go.mod file.
[ ] The repo has a continuous integration process that automatically runs tests that must pass before new pull requests are merged.
[ ] Continuous integration is used to attempt to catch issues prior to releasing this package to end-users.

Please provide some links to your package to ease the review

[ ] forge link (github.com, gitlab.com, etc):
[ ] pkg.go.dev:
[ ] goreportcard.com:
[ ] coverage service link (codecov, coveralls, etc.):

Pull Request content

[ ] The package has been added to the list in alphabetical order.
[ ] The package has an appropriate description with correct grammar.
[ ] As far as I know, the package has not been listed here before.

Category quality

Note that new categories can be added only when there are 3 packages or more.

Packages added a long time ago might not meet the current guidelines anymore. It would be very helpful if you could check 3-5 packages above and below your submission to ensure that they also still meet the Quality Standards.

Please delete one of the following lines:

[ ] The packages around my addition still meet the Quality Standards.
[ ] I removed the following packages around my addition: (please give a short reason for each removal)

Thanks for your PR, you're awesome! :sunglasses:

I work at LabEx, a unique learning platform that has offered Linux and Programming hands-on labs for 7 years. Thanks for this excellent repository. Please let me know if any changes are needed.

avelino / awesome-go