[BUG]: [MAINTAINABILITY] Eliminate onboarding workflow drift across README, QUICKSTART, FAQ, and CONTRIBUTING

[niy-ati]

Bug Description

The repository currently maintains onboarding instructions across multiple documents. As onboarding processes evolve, maintaining consistency across all files becomes increasingly difficult.
This creates a risk of conflicting contributor instructions.

Current Behavior

Workflow information exists across:

1. README.md
2. QUICKSTART.md
3. FAQ.md
4. CONTRIBUTING.md

Risks

1. Contradictory instructions.
2. Stale documentation.
3. Increased maintenance effort.
4. Confusing contributor experience.

Steps To Reproduce

1. Designate QUICKSTART as canonical onboarding documentation.
2. Convert duplicate workflow sections into references.
3. Create documentation ownership structure.
4. Add documentation consistency checks.

Expected Behavior

A single document should act as the canonical onboarding source.
Other documents should reference that source rather than duplicate workflow content.

Screenshots or Additional Context

Benefits

Easier maintenance.
Reduced documentation drift.
Improved contributor experience.

Suggested labels

Level 3 – Repository Maintainability Issue
NSOC'26

Files Potentially Affected

README.md
QUICKSTART.md
FAQ.md
CONTRIBUTING.md

[niy-ati]

@Adez017 , please review and assign it to me