docs: Update Deployment Guide

[NirajC-Microsoft]

Purpose

#To improve the Deployment Guide documentation by making it more user-friendly, comprehensive, and easier to follow, ultimately reducing deployment failures and support requests.

#Specific Goals:

1. Reduce deployment errors by providing clear prerequisite checks and permission verification steps upfront
2. Improve user experience with structured step-by-step guidance and visual clarity (tables, emojis, callouts)
3. Help users choose the right deployment method with a comparison table of environment options
4. Provide clear configuration guidance distinguishing between development/testing and production setups
5. Minimize confusion by organizing content logically into 6 main steps with consistent formatting
6. Enable faster troubleshooting with embedded help links and warnings at critical decision points
7. Support multiple deployment scenarios including environment management and recovery from failures

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

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