Documentation: Rewrite README text, hopefully more friendly now (#146)
    
    Basically it's a whole rewrite of the README \^_^
    
    I tend to be verbose but tried to make it simple, change suggestions welcome of course :P
    
    So it's probably easier to review by looking at the new file rather than the diff.
    
    ---
    
    close #136
    
    Co-authored-by: fr33domlover <fr33domlover@riseup.net>
    Co-authored-by: 6543 <6543@noreply.codeberg.org>
    Co-authored-by: 6543 <6543@obermui.de>
    Reviewed-on: https://codeberg.org/ForgeFed/ForgeFed/pulls/146
    Reviewed-by: 6543 <6543@noreply.codeberg.org>
    Reviewed-by: Ta180m <ta180m@noreply.codeberg.org>
    Co-authored-by: fr33domlover <fr33domlover@noreply.codeberg.org>
    Co-committed-by: fr33domlover <fr33domlover@noreply.codeberg.org>