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/anythingllm/anythingllm-collector.service.j2

@@ -0,0 +1,29 @@
+[Unit]
+Description=AnythingLLM Document Collector
+Documentation=https://docs.anythingllm.com
+After=network.target anythingllm-server.service
+BindsTo=anythingllm-server.service
+
+[Service]
+Type=simple
+User={{ anythingllm_user }}
+Group={{ anythingllm_group }}
+WorkingDirectory={{ anythingllm_directory }}/app/collector
+EnvironmentFile={{ anythingllm_directory }}/app/server/.env
+Environment=NODE_ENV=production
+ExecStart=/usr/bin/node index.js
+Restart=on-failure
+RestartSec=10
+StandardOutput=journal
+StandardError=journal
+SyslogIdentifier=anythingllm-collector
+
+# Security hardening
+NoNewPrivileges=true
+PrivateTmp=true
+ProtectSystem=strict
+ProtectHome=true
+ReadWritePaths={{ anythingllm_directory }}
+
+[Install]
+WantedBy=multi-user.target