Intellisense support for YAML based CloudFormation template files

The Toolkit currently has auto-completion support for JSON-based CloudFormation templates. We received a feature request to provide auto-completion support for YAML based templates.

If this is something you would find useful, you can register your interest by adding a reaction to this issue:

Start by reviewing the Toolkit's existing auto-completion support for JSON-based CloudFormation templates and determine how YAML templates are handled. Define the required YAML auto-completion behavior and verify that CloudFormation YAML files receive equivalent support when the work is complete.

Written by the indexing model from the issue text.