docs: Add deployment instructions for VS Code Web

[Harsh-Microsoft]

Purpose

This pull request updates the deployment documentation to add support for Visual Studio Code Web, making it easier for users to deploy the solution directly from their browser. The main changes include adding a new badge for VS Code Web alongside existing deployment options and providing step-by-step instructions for using this new method.

Deployment options enhancement:

• Added a new "Open in Visual Studio Code Web" badge to the deployment options table in docs/DeploymentGuide.md, allowing users to launch the solution in VS Code Web directly from the documentation.
• Included a dedicated section with step-by-step instructions for deploying the solution using VS Code Web, covering sign-in, subscription selection, environment initialization, and next steps.

Does this introduce a breaking change?

• Yes
• No

How to Test

• Get the code

git clone [repo-address]
cd [repo-name]
git checkout [branch-name]
npm install

• Test the code

What to Check

Verify that the following are valid

• ...

Other Information