Create FUNDING.yml and update readme

Author: epernod

.github/FUNDING.yml

@@ -0,0 +1,14 @@
+# These are supported funding model platforms
+
+github: [InfinyTech3D] # Replace with up to 4 GitHub Sponsors-enabled usernames e.g., [user1, user2]
+patreon: # Replace with a single Patreon username
+open_collective: # Replace with a single Open Collective username
+ko_fi: # Replace with a single Ko-fi username
+tidelift: # Replace with a single Tidelift platform-name/package-name e.g., npm/babel
+community_bridge: # Replace with a single Community Bridge project-name e.g., cloud-foundry
+liberapay: # Replace with a single Liberapay username
+issuehunt: # Replace with a single IssueHunt username
+lfx_crowdfunding: # Replace with a single LFX Crowdfunding project-name e.g., cloud-foundry
+polar: # Replace with a single Polar username
+buy_me_a_coffee: # Replace with a single Buy Me a Coffee username
+custom: # Replace with up to 4 custom sponsorship URLs e.g., ['link1', 'link2']

README.md

@@ -3,6 +3,7 @@
 [![Documentation](https://img.shields.io/badge/info-on_website-green.svg)](https://infinytech3d.com/)
 [![Support](https://img.shields.io/badge/support-on_GitHub_Discussions-blue.svg)](https://github.com/sofa-framework/sofa/discussions)
 [![Discord](https://img.shields.io/badge/chat-on_Discord-darkred.svg)](https://discord.gg/G63t3a8Ra6)
+[![Support us](https://img.shields.io/badge/support_us-on_Github_Sponsor-purple.svg)](https://github.com/sponsors/InfinyTech3D)
 
 ## Description
 This repository gather all open code from InfinyTech3D that could be of any use for the https://www.sofa-framework.org/