feat: prepare-new-server playbook + role struktura

playbook prepare-new-server.yml:
- update systemu
- deploy user (UID 1000, heslo zamknuto)
- SSH klic pro deploy uzivatele
- adresarova struktura (/home/deploy/{docker,scripts,backups,logs,...})
- Docker Engine + Compose plugin (bez sudo)
- UFW firewall (22, 80, 443)
- fail2ban
- overeni docker bez sudo

Role (kazda v samostatnem adresari):
- common: update, base packages, timezone
- deploy-user: vytvoreni usera UID 1000
- ssh-keys: authorized_keys deployment
- firewall: UFW konfigurace
- docker: Docker Engine + Compose + daemon.json
- directories: /home/deploy/{docker/<sluzba>,backups,scripts,logs}

Pouziti:
  ansible-playbook -i inventory.yml playbooks/prepare-new-server.yml

roles/directories/defaults/main.yml

@@ -0,0 +1,42 @@
+---
+# Proměnné pro directories roli
+deploy_user: deploy
+deploy_home: "/home/{{ deploy_user }}"
+
+# Zakladni adresarova struktura
+base_directories:
+  - path: "{{ deploy_home }}/docker"
+    description: "Docker sluzby (kazda v samostatne slozce)"
+    mode: "0755"
+  - path: "{{ deploy_home }}/docker-services-repo"
+    description: "Git repo s docker-compose sablonami (klonovane)"
+    mode: "0755"
+  - path: "{{ deploy_home }}/backups"
+    description: "Lokalni zalohy Docker dat (pred rsync na NAS)"
+    mode: "0750"
+  - path: "{{ deploy_home }}/scripts"
+    description: "Vlastni bash skripty"
+    mode: "0755"
+  - path: "{{ deploy_home }}/logs"
+    description: "Logy serveru (mimo system log)"
+    mode: "0755"
+  - path: "{{ deploy_home }}/.local/bin"
+    description: "Uzivatelske binarky (Hermes atd.)"
+    mode: "0755"
+
+# Podadresare pro Docker stack
+docker_subdirs:
+  - "{{ deploy_home }}/docker/portainer"
+  - "{{ deploy_home }}/docker/nginx-proxy-manager"
+  - "{{ deploy_home }}/docker/vaultwarden"
+  - "{{ deploy_home }}/docker/gitea"
+  - "{{ deploy_home }}/docker/jotty"
+  - "{{ deploy_home }}/docker/nextcloud"
+  - "{{ deploy_home }}/docker/rustdesk"
+  - "{{ deploy_home }}/docker/audiobookshelf"
+  - "{{ deploy_home }}/docker/calibre-web"
+  - "{{ deploy_home }}/docker/plex"
+  - "{{ deploy_home }}/docker/erugo"
+  - "{{ deploy_home }}/docker/jswiki"
+  - "{{ deploy_home }}/docker/speedtest"
+  - "{{ deploy_home }}/docker/watchtower"