docs: note workspace install path

README.md

@@ -14,6 +14,14 @@ Vid-Repair is a cross‑platform CLI that scans video files for container/stream
 cargo build --release
 ```
 
+To install the CLI from the workspace root:
+
+```bash
+cargo install --path ./vid-repair
+```
+
+(`cargo install --path .` will fail because the repo root is a workspace manifest.)
+
 ### Common commands 💻
 
 ```bash