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/inventory/hosts

@@ -0,0 +1,50 @@
+---
+# Ansible Inventory - Simplified
+# Variables moved to:
+#  - host_vars/{hostname}.yml (host-specific config)
+#  - group_vars/all/vars.yml (common variables)
+
+# Red Panda Approved Uranian Hosts
+ubuntu:
+  hosts:
+    ariel.incus:
+    caliban.incus:
+    miranda.incus:
+    oberon.incus:
+    portia.incus:
+    prospero.incus:
+    puck.incus:
+    rosalind.incus:
+    sycorax.incus:
+    titania.incus:
+    korax.helu.ca:
+
+# Service-specific groups for targeted deployments
+agent_s:
+  hosts:
+    caliban.incus:
+
+arke:
+  hosts:
+    sycorax.incus:
+
+casdoor:
+  hosts:
+    titania.incus:
+
+kernos:
+  hosts:
+    caliban.incus:
+    korax.helu.ca:
+
+searxng:
+  hosts:
+    oberon.incus:
+
+gitea:
+  hosts:
+    rosalind.incus:
+
+mcpo:
+  hosts:
+    miranda.incus: