[Adjustment][Van] Enhancements to GitHub Workflow and Documentation

[vansymph]

What does this PR do?

• Integrates new GitHub workflows for better CI/CD
• Adds detailed documentation for maintaining forks and setting up CodePush server

Why did you choose this solution?

• To streamline deployment processes
• To ensure continuity in project maintenance

What is the dependency graph of the changes?

• Azure services dependent on updated workflows
• Documentation updates dependent on the latest project structure and guidelines

How to test/verify?

• Review GitHub action logs for workflow execution
• Validate documentation by following the setup and deployment instructions

Related ticket url:

• No URLs provided

[symphdevtools]

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(RIP hatdog)