Add the githubmoji Firefox addon to /related-tools

[malted]

I made a Firefox addon which suggests gitmojis as you type your commit message. It also converts gitmoji codes (:example:) into the emoji counterparts.

I think this would be a good addition to the /related-tools page.

The repository can be found here, and the Firefox addons page is here

Thoughts?

[johannchopin]

Hey @ma1ted 👋

I see no problem with that 👌 I guess you can go ahead and open a PR

[carloscuesta]

Hey! Please go ahead if you want to I'll close this issue 😊

[malted]

Sorry for the delay!