fix: add .env for vscode web

[Shreyas-Microsoft]

Purpose

This pull request adds several new Azure-related environment variables to the .env file for the infra/vscode_web project. These variables are placeholders for deployment configuration values and will help facilitate Azure integration and deployment consistency.

Azure environment variable additions:

• Added variables for Azure agent ID, environment name, subscription ID, AI project endpoint, and AI project resource ID to the .env file (infra/vscode_web/.env).
• Enabled the AZD_ALLOW_NON_EMPTY_FOLDER flag to allow deployment into non-empty folders (infra/vscode_web/.env).

Does this introduce a breaking change?

• Yes
• No

Golden Path Validation

• I have tested the primary workflows (the "golden path") to ensure they function correctly without errors.

Deployment Validation

• I have validated the deployment process successfully and all services are running as expected with this change.

What to Check

Verify that the following are valid

• ...

Other Information