Refactor: Split portfolio to projects and writings sections, and update content structure

- Renamed 'portfolio' collection to 'projects' in content configuration.
- Introduced a new 'writings' collection with corresponding schema.
- Updated README to reflect changes in content structure and navigation.
- Removed the old portfolio page and added new pages for projects and writings.
- Added multiple new project and writing markdown files with relevant content.
- Updated license year to 2025.
- Enhanced AppHeader for new navigation links.
- Improved ProseImg component styling.

content/projects/bikes-glm.md

@@ -0,0 +1,18 @@
+---
+slug: bikes-glm
+title: 🚲 Generalized Linear Models for Bikes prediction
+description: Predicting the number of bikes rented in a bike-sharing system using Generalized Linear Models.
+publishedAt: 2025/01/24
+readingTime: 1
+tags:
+  - r
+  - data
+  - maths
+---
+
+The project was done as part of the course `Generalised Linear Model` at the Paris-Dauphine PSL University. The goal of the project is to determine the best model that predicts/explains the number of bicycle rentals, based on various characteristics of the day (temperature, humidity, wind speed, etc.).
+
+You can find the code here: [GLM Bikes Code](https://github.com/ArthurDanjou/Studies/blob/master/M1/General%20Linear%20Models/Projet/GLM%20Code%20-%20DANJOU%20%26%20DUROUSSEAU.rmd)
+
+<iframe src="/projects/bikes-glm/Report.pdf" width="100%" height="1000px">
+</iframe>