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/searxng/docker-compose.yml.j2

@@ -0,0 +1,18 @@
+services:
+  searxng:
+    image: searxng/searxng:latest
+    pull_policy: always
+    container_name: searxng
+    ports:
+      - "{{ searxng_port }}:8080"
+    volumes:
+      - ./searxng-settings.yml:/etc/searxng/settings.yml:ro
+    restart: unless-stopped
+    logging:
+      driver: syslog
+      options:
+        syslog-address: "tcp://127.0.0.1:{{searxng_syslog_port}}"
+        syslog-format: "{{syslog_format}}"
+        tag: "searxng"
+
+# Red Panda Approved SearXNG Configuration