chore: add atomys collection (#489)

Author: 42atomys

_data/collection-index.yml

@@ -1143,3 +1143,8 @@
   contact: https://github.com/navinkrishnan/devcontainer-templates-btp/issues
   repository: https://github.com/navinkrishnan/devcontainer-templates-btp
   ociReference: ghcr.io/navinkrishnan/devcontainer-templates-btp
+- name: Atomys Dev Container Features
+  maintainer: Atomys
+  contact: https://github.com/42atomys/devcontainers-features/issues
+  repository: https://github.com/42atomys/devcontainers-features
+  ociReference: ghcr.io/42atomys/devcontainers-features