Api polish

[localagi]

Description

• Cleanup in non-instance methods in Agent.py
• generic lookup methods for agent folder, history file, config file
• history file moved to history.yaml inside agents folder
• renaming, lookup reliably
• small fixes in Promts and Chains
• Tests extensions and tests running

Motivation and Context

How has this been tested?

Screenshots (if appropriate)

Types of changes

Changes visible to users:

• Bug fix (prefix: fix - non-breaking change which fixes an issue)
• New feature (prefix: feat - non-breaking change which adds functionality)
• Breaking change (prefix: feat!! or fix!! - fix or feature that would cause existing functionality to not work as expected)

Internal changes:

• Refactor (prefix: refactor - non-breaking change which only improves the design or structure of existing code, and making no changes to its external behaviour)
• Tests (prefix: test - additions and improvements to unit tests and the smoke tests)
• Infrastructure (prefix: chore - examples include GitHub Actions, issue templates)

Checklist

• My code follows the code style of this project and passes yarn run lint.
• My change requires a change to the documentation.
• My change works!