92 improve ansible configs#93

- move all ansible tasks into their own ansible roles - store packages to install in vars/<os>.yaml - remove all playbooks and replace with one playbook - add a list of roles to run in vars/<os>.yaml var - load envs as a pre_task. to be run before running any roles - update script to use playbook and pass var file to ansible usage: ```bash git clone <url> ~/dotfiles cd ~/dotfiles ./bin/dotfiles.sh <os> # ex: ./bin/dotfiles.sh fedora ```