Add mas-agent-base consolidation (example only)

[adickinson72]

This PR adds the mas-agent-base directory as an example of agent code consolidation.

⚠️ Note: This contains extra code specific to my general agent implementation and is provided as a reference example only. It may be helpful for others working on similar consolidation efforts.

This is not intended to be merged as-is without review and adaptation.

[github-actions]

📊 Test Coverage Report

Main Tests Coverage

Metric	Coverage	Details
Lines	12.6%	245/1940 lines
Branches	0.0%	0/0 branches

RAG Tests Coverage

Metric	Coverage	Details
Lines	59.7%	462/774 lines
Branches	35.7%	70/196 branches

📁 Coverage Artifacts

• Main tests: coverage-reports-main artifact
• RAG tests: coverage-reports-rag artifact
• Download artifacts to view detailed HTML coverage reports