docs(plugins): catalog entry for host_agent

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docs/plugins/index.yaml.example

@@ -94,3 +94,20 @@ plugins:
       - network
       - unifi
       - ubiquiti
+
+  - name: host_agent
+    version: "1.0.0"
+    description: "Remote Linux host resource monitoring via a lightweight Python push agent"
+    author: "Roundtable"
+    license: "MIT"
+    min_app_version: "0.1.0"
+    repository_url: "https://git.fabledsword.com/bvandeusen/Roundtable-plugins"
+    homepage: "https://git.fabledsword.com/bvandeusen/Roundtable-plugins/src/branch/main/host_agent"
+    download_url: "https://git.fabledsword.com/bvandeusen/Roundtable-plugins/releases/download/host_agent-v1.0.0/host_agent.zip"
+    checksum_sha256: ""
+    tags:
+      - host
+      - monitoring
+      - cpu
+      - memory
+      - storage