docs: update release notes and readme file

Signed-off-by: Mohammad Tayyab <Mohammad.Tayyab@neustrom.de>

Author: Mohammad-Tayyab-Frequenz

README.md

@@ -18,6 +18,50 @@ The following platforms are officially supported (tested):
 - **Operating System:** Ubuntu Linux 20.04
 - **Architectures:** amd64, arm64
 
+## CLI
+
+This package ships the `gridpool-cli` command with two subcommands.
+
+### Setup
+
+Set the Assets API credentials before running the CLI:
+
+```bash
+export ASSETS_API_URL="grpc://..."
+export ASSETS_API_AUTH_KEY="..."
+export ASSETS_API_SIGN_SECRET="..."
+```
+
+If you plan to render graphs, install the optional graph dependencies:
+
+```bash
+pip install "frequenz-gridpool[graph]"
+```
+
+### Print component formulas
+
+```bash
+gridpool-cli print-formulas <microgrid_id>
+```
+
+Optional prefix formatting:
+
+```bash
+gridpool-cli print-formulas <microgrid_id> --prefix "{microgrid_id}.{component}"
+```
+
+### Render component graph
+
+```bash
+gridpool-cli render-graph <microgrid_id>
+```
+
+To save without opening a window:
+
+```bash
+gridpool-cli render-graph <microgrid_id> --no-show --output component_graph.png
+```
+
 ## Contributing
 
 If you want to know how to build this project and contribute to it, please

RELEASE_NOTES.md

@@ -10,7 +10,9 @@
 
 ## New Features
 
-<!-- Here goes the main new features and examples or instructions on how to use them -->
+* Added `gridpool-cli render-graph` to visualize microgrid component graphs using the
+  Assets API credentials (`ASSETS_API_URL`, `ASSETS_API_AUTH_KEY`, and
+  `ASSETS_API_SIGN_SECRET`) and optional `graph` extras.
 
 ## Bug Fixes