docs: add Qwen integration guide (#232)

Adds Qwen integration guide documenting convert_qwen/install_qwen behavior and project-scoped setup.

integrations/qwen/README.md

@@ -0,0 +1,43 @@
+# Qwen Code Integration
+
+Qwen Code uses project-scoped `.md` SubAgent files in `.qwen/agents/`.
+
+The generated files come from `scripts/convert.sh --tool qwen`, which writes one
+SubAgent Markdown file per agency agent into `integrations/qwen/agents/`.
+
+## Generate
+
+From the repository root:
+
+```bash
+./scripts/convert.sh --tool qwen
+```
+
+## Install
+
+Run the installer from your target project root:
+
+```bash
+cd /your/project && /path/to/agency-agents/scripts/install.sh --tool qwen
+```
+
+This copies the generated SubAgent files into:
+
+```text
+.qwen/agents/
+```
+
+## Refresh in Qwen Code
+
+After installation:
+
+- run `/agents manage` in Qwen Code to refresh the agent list, or
+- restart the current Qwen Code session
+
+## Notes
+
+- Qwen Code is project-scoped, not home-scoped
+- The generated Qwen files use minimal frontmatter: `name`, `description`, and
+  optional `tools`
+- If you update agents in this repo, regenerate the Qwen output before
+  reinstalling