Improve ReadMe and add edit-this-page config

[dannysheridan]

Important

Remove Node.js setup from workflows, update README, and modify generators.yml for new navigation and edit-this-page config.

• Workflows:
  • Remove Node.js setup steps from preview.yml, publish.yml, and python-sdk.yml.
• README:
  • Update links and instructions for documentation updates and local development.
• Configuration:
  • Update generators.yml with new navigation structure and edit-this-page configuration.

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