Add the March 2025 hackathon announcement

Author: gtca

content/events/2025_03_hackathon.md

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+title = "Scverse Hackathon 2024-03 Paris"
+date = 2025-03-17T00:00:05+01:00
+description = "scverse x Owkin hackathon"
+draft = false
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+
+## Welcome
+
+Join us for the joint [scverse](https://scverse.org) x [Owkin](https://www.owkin.com/) hackathon on **March 17-19, 2025** at the Owkin office in Paris.
+
+This hackathon aims to bring together users and developers of scverse tools, researchers, and owkinautes. The main topic of this hackathon will be spatial transcriptomics. During this hackathon, you will have the opportunity to improve existing code bases and add new features to scverse tools. All contributions will be made publicly available on GitHub under an open source license. 
+
+## Hackathon Tasks
+
+See [here](https://drive.google.com/file/d/1ImwRfcdz4zR4he2f3WRDGcKPNLF0JOdG/view) for a few examples of hackathon tasks. This list is not definitive: more will be added as we collect ideas.
+
+## Application
+
+As we have limited places, please fill out [this application form](https://docs.google.com/forms/d/e/1FAIpQLSd41Mf1mN6lYrx7X84lx-KGWtQ3USZTTou7pCfy5ZtdnIFo1Q/viewform) as soon as possible if you are interested in participating in the hackathon. We will get back to you about your application within a few weeks. Attendance is free of charge and required on-site full-time during the 2 and a half days of the hackathon.