[Adjustment][Van] Group together the guides

[vansymph]

What does this PR do?

• Groups, revises, and enhances guidelines and setup configurations in documentation and YML files.

Why did you choose this solution?

• To streamline development setup and follow best practices for node versioning and OAuth app recommendations.

What is the dependency graph of the changes?

• Changes in .github/workflows affect CI/CD configurations.
• Alterations in documentation impact new developer onboarding and setup clarity.

How to test/verify?

• Review updated documents for clarity and completeness.
• Validate workflow YML changes by running test deployments.

Related ticket url:

• No specific ticket URLs provided.

[symphdevtools]

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When you have new changes to this PR and you want to regenerate the title and PR description, just comment churva!

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Thanks!

(RIP hatdog)