This commit updates documentation across several files to correct broken
file paths and ensure consistency in Ansible command examples
- Standardized inventory naming to `inventory.ini` for sample inventories.
- Fixed `group_vars` paths to reflect the actual directory structure
(e.g., `group_vars/all/all.yml` instead of `group_vars/all.yml`).
- Corrected the `k8s-cluster.yml` filename in guides.
- Clarified the location for `kubectl_localhost` and `kubeconfig_localhost` settings.
- Replaced non-existent placeholders (like `inventory/single.cfg`) with
valid repository paths.
- Fixed typos in directory names (e.g., `myclsuter` -> `mycluster`).
Jiří Suchomel