docs(cli): add per-command CLI pages

docs/cli/plugins.md

@@ -0,0 +1,33 @@
+---
+summary: "CLI reference for `clawdbot plugins` (list, install, enable/disable, doctor)"
+read_when:
+  - You want to install or manage in-process Gateway plugins
+  - You want to debug plugin load failures
+---
+
+# `clawdbot plugins`
+
+Manage Gateway plugins/extensions (loaded in-process).
+
+Related:
+- Plugin system: [Plugins](/plugin)
+- Security hardening: [Security](/gateway/security)
+
+## Commands
+
+```bash
+clawdbot plugins list
+clawdbot plugins info <id>
+clawdbot plugins enable <id>
+clawdbot plugins disable <id>
+clawdbot plugins doctor
+```
+
+### Install
+
+```bash
+clawdbot plugins install <npm-spec>
+```
+
+Security note: treat plugin installs like running code. Prefer pinned versions.
+