[new feature] Developer pods with IDE integration

[arjun-sd]

Describe the New Feature
This is an early draft proposal on this feature. Developers describe a "dev container" as a spec which is then used to spin up a docker container (dev pod) remotely in Kubernetes. IDE integration with remote-dev mode is provided to integrate with VSCode and other IDEs.

A few standards exist to describe "dev containers":

• https://devfile.io/ (this is a CNCF sandbox project)
• https://containers.dev/ (from MSFT)

Additional Considerations
How dev pods relate to Sandboxes is TBD.