feature/refactor: Loop system and Worklist execution model

[ltdrdata]

major changes:

• Preventing stack overflow in deep recursion in Python.
  • Handling worklists of arbitrary length
• Eliminating inefficiency due to call stack cost
• Improved control over the processing order of nodes
• Add functionality of interrupting a specific execution path in a node using the return None value.
• Allows '*' input/output for nodes
• Support loop structure
• Allow the outputs of muted nodes to be preserved instead of discarding them, enabling them to be utilized later in the workflow.
• Allows empty list for output

minor improvement:

• bugfix about crash related to specific mute condition