Update CHANGELOG and CITATION and README for release v1.0.0

Author: amyheather

CHANGELOG.md

@@ -0,0 +1,10 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html). Dates formatted as YYYY-MM-DD as per [ISO standard](https://www.iso.org/iso-8601-date-and-time-format.html).
+
+## v1.0.0 - 2025-03-28
+
+🌱 First release of the presentation.

CITATION.cff

@@ -16,3 +16,5 @@ authors:
 repository-code: >-
   https://github.com/pythonhealthdatascience/gw4_prize_presentation
 license: CC-BY-4.0
+version: '1.0.0'
+date-released: '2025-03-28'

README.md

@@ -50,6 +50,10 @@ If you wish to cite this presentation, please refer to the `CITATION.cff`. As an
 
 > Heather, A. (2025). Improving Reproducibility in Open Healthcare Simulation. Presentation for the GW4 Open Research Prize 2024/25 Improving Quality. https://github.com/pythonhealthdatascience/gw4_prize_presentation.
 
+You can also cite the archived version of this repository on Zenodo:
+
+> TBC.
+
 <br>
 
 ## 💰 Funding