Change fan guide to use t2fand and remove 'secondary option' from touchbard

[AdityaGarg8]

Here you should add instructions to add the pacman repo as well.

[AdityaGarg8]

I also have added it to the apt repo for Ubuntu (https://github.com/AdityaGarg8/t2-ubuntu-repo). You can add that to the instructions as well.

[NoaHimesaka1873]

Here you should add instructions to add the pacman repo as well.

I didn't add it because I assumed the user would have followed t2linux Arch installation guide, which of course adds the necessary repositories. I'll add warning to indicate that.

[AdityaGarg8]

I'd rather separate fan into 3 sections

1st for Arch based distros 2nd for Debian and Ubuntu based distros 3rd for rest cases

1st and 2nd having instructions to add repo and install the package.

[NoaHimesaka1873]

Damn linter sucks it can't even properly parse numbered list