Add features by nkaaf (#697)

Co-authored-by: Abdurrahmaan Iqbal <abdurriq@github.com>

Author: nkaaf

_data/collection-index.yml

@@ -1491,3 +1491,8 @@
   contact: https://github.com/doughatcher/devcontainer-templates/issues
   repository: https://github.com/doughatcher/devcontainer-templates
   ociReference: ghcr.io/doughatcher/devcontainer-templates
+- name: Devcontainer Features by nkaaf
+  maintainer: nkaaf
+  contact: https://github.com/nkaaf/devcontainer-features/issues
+  repository: https://github.com/nkaaf/devcontainer-features
+  ociReference: ghcr.io/nkaaf/devcontainer-features