Add Matilda Code Features to collection index

Author: maincode-dave

_data/collection-index.yml

@@ -1566,3 +1566,8 @@
   contact: https://github.com/bare-devcontainer/templates/issues
   repository: https://github.com/bare-devcontainer/templates
   ociReference: ghcr.io/bare-devcontainer/templates
+- name: Matilda Code Features
+  maintainer: Maincode
+  contact: https://github.com/MaincodeHQ/devcontainer-features/issues
+  repository: https://github.com/MaincodeHQ/devcontainer-features
+  ociReference: ghcr.io/maincodehq/devcontainer-features