GSoC announcement (aeon-toolkit#2629)

Author: MatthewMiddlehurst

docs/conf.py

@@ -199,6 +199,7 @@ def find_source():
 # documentation.
 
 html_theme_options = {
+    "announcement": "<em>Announcement</em>: aeon is taking part in the Google Summer of Code (GSoC) 2025! See the home page for more information.",  # noqa: E501
     "sidebar_hide_name": True,
     "top_of_page_button": "edit",
     "source_repository": "https://github.com/aeon-toolkit/aeon/",

docs/index.md

@@ -17,6 +17,15 @@ segmentation and similarity search.
 - We provide a range of tools for reproducing benchmarking results and evaluating time
   series algorithms implemented in `aeon` and other `scikit-learn` compatible packages.
 
+```{admonition} GSoC 2025
+`aeon` is participating in Google Summer of Code 2025 under the NumFOCUS umbrella. If
+you are interested in participating, please see our [GSoC 2025 project page](https://github.com/aeon-toolkit/aeon-admin/blob/main/gsoc/gsoc-2025-projects.md).
+Feel free to ask questions on the dedicated [GitHub discussion](https://github.com/aeon-toolkit/aeon/discussions/2530)
+or our [Slack channel](https://join.slack.com/t/aeon-toolkit/shared_invite/zt-22vwvut29-HDpCu~7VBUozyfL_8j3dLA).
+If you are interested in contributing, click on the "Contributing to aeon" link in the
+sidebar for a contribution guide. Applications close April 8th.
+```
+
 ## Community Channels
 
 **GitHub**: [github.com/aeon-toolkit/aeon](https://github.com/aeon-toolkit/aeon)