docs: add LXC docs

fix(flake): alejandra don't run always

feat: rest of lxc common, working dns configuration

wip: continue prometheus role

feat(systems/hosts/arwen): libreoffice

wip: lxc stuff

feat: pre commit hooks

feat(hosts/alice): enable flatpak

feat(systems/hosts/arwen): add a few packages to systemPackages...

feat(hosts/arwen): enable tailscale

feat(roles/tailscale): add tailscale role

feat(roles/docker, roles/base): docker role

chore: format

fix(roles/bluetooth): enable... bluetooth

feat(roles/graphics): merge graphics roles

feat(roles/amdgpu, hosts/arwen): amdgpu role

feat(roles/audio): add pavucontrol

fix(hosts/arwen): update gaming role

feat(roles/gaming): move steam, add lutris

feat(systems/hosts/alice): include some core packages in a temporary way for now