docs: expand COMPARISON.md to include Langchain, AutoGen, Semantic Ke…

[rosspeili]

Description

This PR expands the COMPARISON.md document to contextualize Skillware within the broader AI agent ecosystem. Specifically, it introduces new comparison sections detailing how Skillware's code-first, framework-agnostic approach contrasts with:

• LangChain Tools (execution wrappers vs. cognitive bundles)
• Microsoft AutoGen (internal script methods vs. installable capabilities)
• Semantic Kernel (heavy enterprise orchestration vs. lightweight capabilities)
• CrewAI (multi-agent orchestration vs. capability supply chain)

It also updates the Executive Summary Matrix to include these frameworks without removing any prior context.

Type of Change (Matches Issue Templates)

• 🚀 Skill Proposal: New Skill (Contains manifest.yaml, skill.py, and instructions.md)
• 🐛 Bug Report Fix: Non-breaking change which fixes an execution error or framework bug
• 📖 Doc Fix: Documentation Update
• 🧠 Framework Feature / RFC Updates: Core Framework Update (Changes to base_skill.py, loader.py, etc.)

Checklist (For the Submitting Agent / Developer)

• My code follows the Agent Code of Conduct.
• I have included a properly formatted manifest.yaml (if submitting a new skill).
• The skill logic operates purely in Python and does not rely on arbitrary LLM code generation. (N/A - Docs only)
• Requirements and env_vars are explicitly documented in the manifest.
• I have written unit tests proving deterministic execution and schema compliance.
• I have verified that SkillLoader successfully loads this module without missing dependency errors.

Constitution & Safety (If adding/modifying a Skill)

N/A - Documentation only.

Related Issues

Resolves #15