Merge branch 'add_sponsor' into 'master'

Add SPONSORS

See merge request sfcgal/SFCGAL!320

SPONSORS.md

@@ -0,0 +1,24 @@
+# Sponsors and Contributors
+
+## Sponsors
+
+We gratefully acknowledge the support of our sponsors. Their contributions help make this project possible.
+SFCGAL are sponsored by the following organizations:
+
+| Sponsor        | Logo                                                                                          | Web/Description                                                                                  |
+|----------------|-----------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------|
+| Oslandia       | ![Oslandia](doc/images/sponsors/oslandia.png){height=123px}                                | [Oslandia](https://oslandia.com)                                                                      |
+| Dalibo         | ![Dalib](doc/images/sponsors/logo-dalibo.png){height=123px}                                | [Dalibo](https://www.dalibo.com)                                                                      |
+| BPI France     | ![BPI France](doc/images/sponsors/bpi_france.png){height=123px}                       | [BPI France](https://www.bpifrance.com/)                                                              |
+| France 2030    | ![France 2030](doc/images/sponsors/france_2030.png){height=123px}                          | Funded by the French government as part of France 2030                                     |
+| France Relance | ![France Relance](doc/images/sponsors/france_relance.png){height=123px} ![EU](doc/images/sponsors/ue_next_generation.png){height=123px} | Funded by the European Union - Next Generation EU as part of the France Relance plan |
+
+If you wish to sponsor SFCGAL, you can contact us at [[email protected]](mailto:[email protected]).
+
+
+## Contributors
+
+The SFCGAL project would not be possible without the dedicated efforts of its contributors. All contributors are listed in [AUTHORS](AUTHORS):
+
+
+Thank you to all our contributors for your support and dedication to the project!