plenty of linter warnings

[ikke-t]

run ansible-lint in this directory, and you get tons of warnings. They are mostly about good practises, and many of them has appeared long after the role was written. However it would be nice to clean it up. In case someone is willing to practice some ansible best practises, this is for you :)

[edenhaus]

The following issues still exists after #72 is merged:

var-naming: File defines variable 'systemd_TimeoutStartSec' that violates variable naming standards (warning)
.roles/ikke_t.podman_container_systemd/defaults/main.yml:15

var-naming: File defines variable 'systemd_RestartSec' that violates variable naming standards (warning)
.roles/ikke_t.podman_container_systemd/defaults/main.yml:16

var-naming: File defines variable 'systemd_After' that violates variable naming standards (warning)
.roles/ikke_t.podman_container_systemd/defaults/main.yml:23

var-naming: File defines variable 'systemd_Before' that violates variable naming standards (warning)
.roles/ikke_t.podman_container_systemd/defaults/main.yml:24

var-naming: File defines variable 'systemd_Conflicts' that violates variable naming standards (warning)
.roles/ikke_t.podman_container_systemd/defaults/main.yml:25

var-naming: File defines variable 'systemd_RequiredBy' that violates variable naming standards (warning)
.roles/ikke_t.podman_container_systemd/defaults/main.yml:26

var-naming: File defines variable 'systemd_Requires' that violates variable naming standards (warning)
.roles/ikke_t.podman_container_systemd/defaults/main.yml:27

var-naming: File defines variable 'systemd_WantedBy' that violates variable naming standards (warning)
.roles/ikke_t.podman_container_systemd/defaults/main.yml:28

var-naming: File defines variable 'systemd_Wants' that violates variable naming standards (warning)
.roles/ikke_t.podman_container_systemd/defaults/main.yml:29

role-name: Role name ikke_t.podman_container_systemd does not match ``^[a-z][a-z0-9_]*$`` pattern. (warning)
.roles/ikke_t.podman_container_systemd/meta/main.yml:1

risky-file-permissions: File permissions unset or incorrect. (warning)
.roles/ikke_t.podman_container_systemd/tasks/main.yml:25 Task/Handler: Ensure systemd files directory exists if user not root

Changing the variable names is a breaking change and not sure if this is wanted