docs: rewrite README with structured overview and quick start guide

Replaces the minimal project description with a comprehensive README
including a component overview table, quick start instructions, common
Ansible operations, and links to detailed documentation. Aligns with
Red Panda Approval™ standards.

ansible/neo4j/docker-compose.yml.j2

@@ -0,0 +1,31 @@
+services:
+  neo4j:
+    image: neo4j:{{neo4j_version}}
+    container_name: neo4j
+    restart: unless-stopped
+    ports:
+      - "{{neo4j_http_port}}:7474"
+      - "{{neo4j_bolt_port}}:7687"
+    volumes:
+      - neo4j_data:/data
+      - neo4j_logs:/logs
+      - neo4j_plugins:/plugins
+    environment:
+      NEO4J_AUTH: "{{neo4j_auth_user}}/{{neo4j_auth_password}}"
+      # APOC Plugin
+      NEO4J_PLUGINS: '["apoc"]'
+      NEO4J_apoc_export_file_enabled: "true"
+      NEO4J_apoc_import_file_enabled: "true"
+      NEO4J_apoc_import_file_use__neo4j__config: "true"
+      NEO4J_dbms_security_procedures_unrestricted: "{{neo4j_apoc_unrestricted}}"
+    logging:
+      driver: syslog
+      options:
+        syslog-address: "tcp://127.0.0.1:{{neo4j_syslog_port}}"
+        syslog-format: "{{syslog_format}}"
+        tag: "neo4j"
+
+volumes:
+  neo4j_data:
+  neo4j_logs:
+  neo4j_plugins: