reinitiated NvChad Guide on development branch

[ambaradan]

Author checklist (Completed by original Author)

• [x] Contribution a good fit for the Rocky project? Title and Author MetaTags inserted ?
• [ ] Is this a non-English contribution?
• [x] If applicable, steps and instructions have been tested to work on a real system
• [x] Did you perform an initial self-review to fix basic typos and grammatical correctness

Rocky Documentation checklist (Completed by Rocky team)

• [ ] 1st Pass (Check that document is good fit for project and author checklist completed)
• [ ] 2nd Pass (Technical Review - check for technical correctness)
• [ ] 3rd Pass (Basic Editorial Review)
• [ ] 4th Pass (Detailed Editorial Review and Peer Review)
• [ ] Final pass/approval (Final Review)