Take advantage of the new README features

[Joakker]

Closes #3550
This PR takes advantage of the new Github features for auto generating the table of contents. It also adds emojis to every header in the document to make them distinguishable from one another

[avelino]

Thank you for contributing with awesome-go, we will revise your contribution as soon as possible.

Automation body links content check:

• godoc.org or pkg.go.dev: True
• goreportcard.com: False
• coverage: False

your project is about to be approved, it's under revision, it may take a few days

[Joakker]

I should also mention that the headers don't exactly map out to the emojis' meanings, since some of them were a bit too specific to find a suitable one, and some of them are duplicated, but in general, I tried to make the emoji be at least tangentially related in meaning to the title they correspond to.

[Joakker]

There, this seems to work well

[avelino]

Put the emoji in the prefix is breaking the test alphabetically, we have put at the end of the title

Check Travis-CI: https://travis-ci.com/github/avelino/awesome-go/builds/222335165

[avelino]

@Joakker many links are broken, are you aware of this?

Can you keep working on this change?

[Joakker]

I can. But most of the links work on my end, so I don't know what is going on

EDIT: I went through the links, and all of them seem to work well. Which ones do you have a problem in?

[github-actions]

This PR has been automatically marked as closed because it has not had recent activity. They will wait 15 days for your interaction, after that the PR will be closed. Please read more in https://github.com/avelino/awesome-go/blob/master/CONTRIBUTING.md