add Kodjin extension to devcontainer for profile preview

[cybernop]

Contributor Pull Request

Add "Kodjin FHIR Profiler" extension to devcontainer

Description

Add "Kodjin FHIR Profiler" extension to devcontainer

Motivation and Context

Enables visual preview of a profile in VS Code

How has this been tested?

By using it

Snippets or Screenshots (if necessary):

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 not work as expected)

Checklist:

• My code follows the code style of this IG / specification.
• My change requires a change to the documentation or narrative (intend) of the IG.
• I have already updated the documentation / narrative (intend) accordingly.