chore: add basic template validate workflow

[LucasRoesler]

Create a CI workflow that will create and build an "echo" function for each template in the repo. This allows us to ensure that the basic structure of the template is functional.

Motivation and Context

• I have raised an issue to propose this change (required)
• My issue has received approval from the maintainers or lead with the design/approved label

Helps to prevent #63

How Has This Been Tested?

Waiting to see Github run the workflow

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I've read the CONTRIBUTION guide
• I have signed-off my commits with git commit -s
• I have added tests to cover my changes.
• All new and existing tests passed.

[alexellis]

LGTM