refactor: ceske nazvy playbooku a roli bez diakritiky

Playbooky (novy nazev -> co dela):
- priprav-novy-server.yml (kompletni setup noveho serveru)
- nasad-sluzby.yml (nasadi Docker sluzby z docker-services/)
- aktualizuj-sluzby.yml (docker compose pull && up -d)
- zabezpec-server.yml (sysctl, auditd, unattended-upgrades)
- bootstrap-server.yml SMAZAN (duplicitni s priprav-novy-server)

Role (novy nazev -> co dela):
- zaklad (update + base baliky + timezone)
- uzivatel-deploy (vytvori deploy usera UID 1000)
- ssh-klice (authorized_keys deployment)
- docker (Docker Engine + Compose plugin) - ponechan anglicky (IT konvence)
- adresare (/home/deploy/{docker,scripts,backups,logs,...})
- firewall SMAZAN (nepouziva se)

Reference v playbooku aktualizovany na nove nazvy roli.
README.md kompletne prepracovan v cestine pro zacatecniky - vysvetluje
co Ansible je, jak nainstalovat, jak vytvorit inventory, jak spustit
playbook, jak overit ze vse funguje.

roles/ssh-klice/defaults/main.yml

@@ -0,0 +1,14 @@
+---
+# Proměnné pro ssh-keys roli
+deploy_user: deploy
+deploy_home: "/home/{{ deploy_user }}"
+ssh_key_path: "{{ deploy_home }}/.ssh/authorized_keys"
+ssh_key_owner: "{{ deploy_user }}"
+ssh_key_group: "{{ deploy_user }}"
+ssh_key_mode: "0600"
+
+# Verejne klice pro deploy uzivatele (nastav v inventory.yml)
+# deploy_ssh_public_keys:
+#   - "ssh-ed25519 AAAAC3Nz... hermes@mac"
+#   - "ssh-rsa AAAAB3... backup@server"
+deploy_ssh_public_keys: []

roles/ssh-klice/tasks/main.yml

@@ -0,0 +1,23 @@
+---
+- name: Over ze deploy_ssh_public_keys je nastaveno
+  ansible.builtin.assert:
+    that:
+      - deploy_ssh_public_keys is defined
+      - deploy_ssh_public_keys | length > 0
+    fail_msg: "deploy_ssh_public_keys neni nastaven. Pridej ho do group_vars/all.yml nebo inventory."
+
+- name: Nastav authorized_keys pro deploy uzivatele
+  ansible.posix.authorized_key:
+    user: "{{ deploy_user }}"
+    state: present
+    key: "{{ item }}"
+    exclusive: false  # neprepisuj existujici klice
+  loop: "{{ deploy_ssh_public_keys }}"
+  when: deploy_ssh_public_keys | length > 0
+
+- name: Nastav spravna opravneni na authorized_keys
+  ansible.builtin.file:
+    path: "{{ ssh_key_path }}"
+    owner: "{{ ssh_key_owner }}"
+    group: "{{ ssh_key_group }}"
+    mode: "{{ ssh_key_mode }}"