feat: Added main.waf.parameters.json with updated parameters and updated deployment.md with waf deployment steps

[Kanchan-Microsoft]

Purpose

This pull request adds improved documentation and configuration options for deploying the Content Generation Solution Accelerator, with a focus on distinguishing between sandbox/dev and production environments. It introduces a new production-ready parameters file aligned with the Well-Architected Framework (WAF), updates deployment instructions, and clarifies parameter usage for different environments.

Deployment Documentation Improvements:

• Added a new "Deployment Options" section to DEPLOYMENT.md, explaining the use of the default sandbox (main.parameters.json) and new production (main.waf.parameters.json) parameter files, and providing step-by-step instructions for switching between them.

Production Configuration Support:

• Introduced main.waf.parameters.json, a production-ready parameters file with WAF-aligned settings, including enabled monitoring, private networking, and scalability options, as well as required VM admin credentials.

Sandbox/Dev Configuration Adjustments:

• Removed enablePrivateNetworking, enableMonitoring, enableScalability, and enableRedundancy parameters from main.parameters.json to simplify the sandbox/dev configuration and reduce potential confusion between environments.

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

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