feat: add structure reorganizer and conflict resolver

[CaralHsi]

Description

This PR adds the structure reorganizer and conflict resolver modules to improve the graph memory structure.
It also introduces redundancy handling, reason nodes (for inferred nodes).
A new is_organize option is added to TreeConfig (default False).
Updated tests, added schedule as a new dependency.

Motivation:

Enhance the system’s ability to manage conflicting and redundant nodes automatically and support more robust structure optimization.

Dependencies:

Adds schedule for background task scheduling.

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Refactor (does not change functionality, e.g. code style improvements, linting)
• Documentation update

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

Please delete options that are not relevant.

• Unit Test
• Test Script (please provide)

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have checked my code and corrected any misspellings

Maintainer Checklist

• closes #xxxx (Replace xxxx with the GitHub issue number)
• Made sure Checks passed

[fridayL]

approved merge

1. add structure reorganizer

[fridayL]

1. add structure reorganizer