Add "Follow Me" block

[mattwiebe]

This will add a "Follow Me" block that will produce a dialog for educating and enabling fab fediverse following!

Proposed changes:

Other information:

• Have you written new tests for your changes, if applicable?

Testing instructions:

• Go to '..'

[mattwiebe]

I'd like to figure out what's going on with those phpcs CI builds, I can't replicate those errors locally at all with composer run lint which is theoretically running the same command

[mattwiebe]

I can't replicate those errors locally at all

I just needed to rm -rf vendor && composer install - something had gone wrong in my local install. Now added a composer run lint:fix command to call phpcbf

[mattwiebe]

This is pretty close to ready now?

We are abusing the Link color to set the button color. Otherwise there's no really good way to set it.

[pfefferle]

:)

[pfefferle]

Can you also update the changelog?!?

[mattwiebe]

dce6daa - it looks a bit busier because I picked a consistent "no periods" style. :)