docs: Add token permission requirements to README

[adamrtalbot]

Summary

• Added a clear table documenting the minimum workspace role required for each Node-RED node
• Includes requirements for Launch workflow, Monitor workflow, Create Dataset, List/Poll Data Link Files, and Create Studio nodes
• Recommends Maintain role for full automation functionality

Changes

• Added "Required Token Permissions" section to README under Seqera Config Node
• Created table mapping each node to its minimum required role (View, Launch, or Maintain)
• Based on official Seqera Platform role permissions matrix

Fixes #3

🤖 Generated with Claude Code

[Copilot]

Pull Request Overview

This PR adds documentation about token permission requirements for various Node-RED nodes in the Seqera Platform integration. It clarifies the minimum workspace role needed for each operation, helping users configure appropriate access tokens.

Key changes:

• Added a "Required Token Permissions" section with a table mapping each node to its minimum required role
• Included a recommendation to use the Maintain role for full automation functionality

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