Let's add Continue extension into the embedded plugin registry

Additional resources:

• A demo how it could be used: https://www.youtube.com/watch?v=DvEYNQTjn34
• How to use the workspace in your own project and some more details around the LLMs being used: https://github.com/sa-mw-dach/dev_demos/blob/main/demos/05_ai_assistant/README.md#alternative-use-local-llm-directly-within-openshift-dev-spaces