Outreachy Demo Day December 2025 Round

The OCaml community participated in the December 2025 round of Outreachy internships. We had four interns working on Raven, OCaml-TIFF and YOCaml. This meeting was an opportunity for the interns to present their work and for the community to ask questions and was [originally announced on the discuss forum](https://discuss.ocaml.org/t/outreachy-demo-day-for-december-2025-round).