Huge role refactoring/cleanup. Other commits will propably follow. Because some bugs will exist. Still important for longrun and also for auto docs/help/slideshow generation

roles/web-app-nextcloud/docs/OCC.md

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+
+# OCC (Nextcloud Command Line) 🔧
+
+Reference for frequently used OCC commands, including user and app management.
+
+## General Use
+
+To use OCC, run:
+```bash
+docker-compose exec -it -u www-data application /var/www/html/occ
+```
+
+## App Administration
+```bash
+docker compose exec -u www-data application php occ config:list {{app_name}}
+```
+
+## Initialize Duplicates
+```bash
+docker-compose exec -it -u www-data application /var/www/html/occ duplicates:find-all --output
+```
+
+## Unlock Files
+```bash
+docker-compose exec -it -u www-data application /var/www/html/occ maintenance:mode --on
+docker-compose exec -it nextcloud_database_1 mysql -u nextcloud -pPASSWORD1234132 -D nextcloud -e "delete from oc_file_locks where 1"
+docker-compose exec -it -u www-data application /var/www/html/occ maintenance:mode --off
+```