docs: add CLI usage and integrate generation in release

www/docs/cli/filebrowser-users.md

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+# filebrowser users
+
+Users management utility
+
+## Synopsis
+
+Users management utility.
+
+## Options
+
+```
+  -h, --help   help for users
+```
+
+## Options inherited from parent commands
+
+```
+  -c, --config string     config file path
+  -d, --database string   database path (default "./filebrowser.db")
+```
+
+## See Also
+
+* [filebrowser](filebrowser.md)	 - A stylish web-based file browser
+* [filebrowser users add](filebrowser-users-add.md)	 - Create a new user
+* [filebrowser users export](filebrowser-users-export.md)	 - Export all users to a file.
+* [filebrowser users find](filebrowser-users-find.md)	 - Find a user by username or id
+* [filebrowser users import](filebrowser-users-import.md)	 - Import users from a file
+* [filebrowser users ls](filebrowser-users-ls.md)	 - List all users.
+* [filebrowser users rm](filebrowser-users-rm.md)	 - Delete a user by username or id
+* [filebrowser users update](filebrowser-users-update.md)	 - Updates an existing user
+