Add code download page

Author: DiogoRibeiro7

_pages/code-download.md

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+---
+layout: single
+title: "Code Download"
+permalink: /code/
+author_profile: true
+---
+
+This page provides convenient links to code examples referenced throughout the blog. The full source for this website, including these examples, is available on [GitHub](https://github.com/DiogoRibeiro7/DiogoRibeiro7.github.io).
+
+## Individual files
+
+You can download specific files directly from the repository:
+
+- [Michelson–Morley experiment visualization]({{ '/code/michelson_morley.py' | relative_url }})
+- [Example notebook]({{ '/code/Untitled.ipynb' | relative_url }})
+
+## Repository download
+
+If you would like to obtain the entire collection of examples, clone the repository using Git or grab the automatic ZIP archive:
+
+```bash
+git clone https://github.com/DiogoRibeiro7/DiogoRibeiro7.github.io.git
+```
+
+Or visit [the GitHub project page](https://github.com/DiogoRibeiro7/DiogoRibeiro7.github.io) and use **Download ZIP**.
+
+---
+
+Feel free to reach out at [[email protected]](mailto:[email protected]) for professional enquiries or [[email protected]](mailto:[email protected]) for personal matters. My ORCID is [0009-0001-2022-7072](https://orcid.org/0009-0001-2022-7072) and I’m affiliated with **ESMAD - Instituto Politécnico do Porto**.