chore(release): add changelog + citation.cff version/date

Author: amyheather

CHANGELOG.md

@@ -0,0 +1,34 @@
+# 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).
+
+## v0.1.0 - 2025-09-10
+
+🌱 Initial release of the website (work in progress). This version introduces the website structure and the first written sections (up to *Output Analysis*).
+
+### Added
+
+* Project overview page (*STARS*).
+* Introduction section covering:
+    * Reproducibility and RAPs
+    * Guidelines
+    * Open-source languages
+    * Example conceptual models
+* Setup section covering:
+    * Version control
+    * Environments
+    * Structuring as a package
+    * Code organisation
+* Model inputs section covering:
+    * Input modelling
+    * Input data management
+    * Parameters from script
+    * Parameters from file
+    * Parameter validation
+* Model building section covering:
+    * Randomness
+    * Entity generation
+    * Entity processing

CITATION.cff

@@ -41,3 +41,5 @@ keywords:
   - simmer
   - rap
 license: MIT
+version: '0.1.0'
+date-released: '2025-09-10'