docs: add documentation for project directory

README.md

@@ -33,6 +33,9 @@ $ pip install uv
 ### 3. Activate the Virtual Environment
 
 ```bash
+# Set up .venv if haven't yet
+$ uv venv
+
 # On MacOS and Linux.
 $ source .venv/bin/activate
 
@@ -53,3 +56,15 @@ streamlit run app.py
 ```
 
 This will launch the app, and you can access it by navigating to http://localhost:8501 in your browser.
+
+
+## Project Directory
+```bash
+├── app.py    # main entry used by streamlit to activate app
+├── data/     # contains graph input examples
+├── drawings/ # contains generated graphs, no need to be touched
+├── labelg    # labelg C program
+├── lib/      # contains code auto generated by pyvis, no need to be touched
+├── out/      # contains canonical output
+├── src/      # contains scripts for the program
+```