Document GitHub release install

Author: jiweiqi

README.md

@@ -48,18 +48,25 @@ Out of scope for this first version:
 
 ## Install
 
-Install from PyPI:
+Install the released wheel from GitHub:
 
 ```bash
-uv pip install "sim-plugin-icepak==0.1.0"
+uv pip install "https://github.com/svd-ai-lab/sim-plugin-icepak/releases/download/v0.1.0/sim_plugin_icepak-0.1.0-py3-none-any.whl"
 ```
 
-For source testing against the current main branch:
+For source testing against the release tag or current main branch:
+
+```bash
+uv pip install "git+https://github.com/svd-ai-lab/sim-plugin-icepak.git@v0.1.0"
+```
 
 ```bash
 uv pip install "git+https://github.com/svd-ai-lab/sim-plugin-icepak.git@main"
 ```
 
+The repository includes a manual PyPI publish workflow for maintainers who have
+configured the required package-publishing secret.
+
 After installation, sim-cli should auto-discover the driver and bundled skill:
 
 ```bash