refactor(images): moved images from docs/assets/ into images/

Author: amyheather

README.md

@@ -66,7 +66,7 @@ A **simulation** is a computer model that mimics a real-world system. It allows
 
 In DES models, time progresses only when **specific events** happen (e.g., a patient arriving or finishing treatment). Unlike a continuous system where time flows smoothly, DES jumps forward in steps between events. For example, when people (or tasks) arrive, wait for service, get served, and then leave.
 
-![Simple DES Animation](docs/assets/simple_des.gif)
+![Simple DES Animation](images/simple_des.gif)
 *Simple model animation created using web app developed by Sammi Rosser (2024) available at https://github.com/hsma-programme/Teaching_DES_Concepts_Streamlit and shared under an MIT Licence.*
 
 One simple example of a DES model is the **M/M/s queueing model**, which is implemented in this template. In a DES model, we use well-known **statistical distributions** to describe the behaviour of real-world processes. In an M/M/s model we use:
@@ -191,7 +191,7 @@ This section describes the purposes of each class in the simulation.
 
 <br>
 
-![Model structure diagram](docs/assets/model_structure.png)
+![Model structure diagram](images/model_structure.png)
 
 *Illustration of model structure created using [draw.io](https://draw.io/).*
 
@@ -203,6 +203,7 @@ This section describes the purposes of each class in the simulation.
 repo/
 ├── .github/workflows/    # GitHub actions
 ├── docs/                 # Documentation
+├── images/               # Image files and GIFs
 ├── inputs/               # Folder to store any input data
 ├── notebooks/            # Run DES model and analyse results
 ├── outputs/              # Folder to save any outputs from model