chore(changelog): initial commit

CHANGELOG.md

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+# 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 - 2024-08-16
+
+🌱 First release. EOM-RCC model as shared by the PenTAG team, with minor changes that enabled us to run the model.
+
+### Added
+
+* Code from the original repository - <https://github.com/nice-digital/NICE-model-repo>
+* R environment for dependency management (`renv`)
+
+### Changed
+
+* Set model to run sequentially (in `2_Scripts/Model_Structure.R`)