fix: odstranit firewall roli + pridat btop, mc, tree do base packages
Firewall (UFW) neni pozadovan:
- smazana cela role roles/firewall/
- odstraneny reference z prepare-new-server.yml
- pridana poznamka v group_vars/all.yml.example
- doporuceni: firewall resit externe (Cloudflare Tunnel, security group)
Base packages - pridany chybejici utility:
+ btop (system monitor - lepsi nez htop)
+ mc (Midnight Commander - textovy file manager)
+ tree (struktura adresaru v terminalu)
Ponechany: curl, wget, git, vim, htop, ca-certificates, gnupg,
lsb-release, apt-transport-https, bash-completion,
software-properties-common, unzip, zip, rsync, net-tools