chore: import upstream snapshot with attribution

docs/cli/launch/render.md

@@ -0,0 +1,22 @@
+# vllm launch render
+
+## Overview
+
+`vllm launch render` starts a GPU-less rendering server for preprocessing and
+postprocessing only.
+
+```bash
+vllm launch render meta-llama/Llama-3.2-1B-Instruct --port 8100
+```
+
+This command reuses the standard serving parser, so model, frontend,
+networking, and related CLI options follow the same conventions as
+[`vllm serve`](../serve.md).
+
+## JSON CLI Arguments
+
+--8<-- "docs/cli/json_tip.inc.md"
+
+## Arguments
+
+--8<-- "docs/generated/argparse/launch_render.inc.md"