Set up github sponsor feature for the OSM france github org

[momentmal]

The server hosting CyclOSM rendering is a quite old one and we must move this service to another machine.

Recently, we got a huge scrapping of tiles coming from one IP address located in China. I blocked it a few hours ago.

More black-listing may be necessary, like what we do on the humanitarian tiles or the french style for: private sites, lack of attribution, commercial use, abusive traffic, etc (see our policy: https://www.openstreetmap.fr/usage/)

As mentioned in #625 there is (was?) need for newer hardware for CyclOSM rendering (the tileset is down again since yesterday as mentioned in #650 and #653).
If OSM France is short on budget, I'd suggest that you setup the possibility to get github sponsorships for the org, as this is a very comfortable / low friction way to provide a little support for you.

https://github.com/sponsors

[danieldegroot2]

I would like to suggest the following where relevant

Add a Sponsor button to this(/these) repository(/ies), linking to the donation page at
https://openstreetmap.assoconnect.com/collect/donation/01KDKG8D29421DZM4YQZ6Z0NZ5/faites-un-don-a-openstreetmap-france-2026

_{Assuming the URL stays relatively stable..}

GitHub allows users to add a custom sponsorship/donate/donation link button to their repositories.
https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/displaying-a-sponsor-button-in-your-repository

Additionally, you can add badges to the README.md(s), at least for the Donate page.
OSMFR could also apply such thing organisation-wide with all repos, including charters, where (still) needed.

Examples

• Update README.md - Update contact links OpenRailwayMap/OpenRailwayMap#897
• https://github.com/umap-project/umap/blob/master/README.md

_{I am aware the Shields organisation may or may not collect some data via these badges. You can also use regular markdown to achieve similar. What you use is up to you.}

This allows (GitHub) users to more easily discover the Donate page.
It more prominently shows you are open to funding and similar.