Add Bing grounding connection to infra (bicep) and test container app integration

[thegovind]

Overview
Integrate Bing grounding connection into the infrastructure as code (Bicep) templates. Ensure thorough testing, including verifying that the devui runs successfully in Azure Container Apps after executing azd up.

Tasks

• Update Bicep templates to include grounding connection.
• Run full infra deployment with azd up.
• Confirm that devui is operational within Azure Container Apps post-deployment.
• Document test results and any required configuration steps.

Acceptance Criteria

• Grounding connection is present and correctly configured in infra code.
• Automated or manual tests confirm devui runs as expected in container apps.
• All relevant documentation is updated.