Add observability platform Ansible project

Deploys the Grafana stack (Prometheus/Alertmanager/Loki/Tempo/Grafana with
Alloy as collector) and the ELK stack (Filebeat/Logstash/Elasticsearch/
Kibana) via Docker Compose on a target host. External to the application
repo, pre-built by the mentor.

ansible/ansible.cfg

@@ -0,0 +1,10 @@
+[defaults]
+inventory = inventory/hosts.yml
+roles_path = roles
+host_key_checking = False
+interpreter_python = auto_silent
+retry_files_enabled = False
+
+[ssh_connection]
+pipelining = True
+