add ollama version and instruction for teenages

[ezcat207]

Title: feat: add Ollama support and simplified instructions for teenagers
Summary
This PR introduces two major updates to the learn-claude-code repository:

Ollama Integration: A parallel set of agent scripts (s01 through s12) that utilize Ollama via its OpenAI-compatible API. This allows users to run the entire agent evolution series using local models (e.g., qwen2.5-coder:7b).

Teenager-Focused Docs: A new documentation suite under docs/en-13year/ designed to explain complex agentic concepts (loops, tools, context management, and teams) to a younger audience (ages 13+).

Key Technical Changes

1. Local Model Support (Ollama)
   API Adaptation: Implemented agents/s*_ollama.py versions of all core sessions. These scripts replace the Anthropic SDK with the openai Python library to interface with Ollama’s local server.

Format Transformation: * Converted Anthropic’s input_schema tool definitions to OpenAI’s function.parameters format.

Adapted the agent loop to handle OpenAI-style tool_calls and finish_reason.

Updated message structures to support the role: "tool" requirement.

Environment Variables: Added OLLAMA_BASE_URL and OLLAMA_MODEL_ID to the .env configuration.

2. Educational Content
   Simplified Concepts: Created 12 new markdown files that break down professional agent engineering into relatable analogies (e.g., describing context windows as "sticky notes" or subagents as "helpers with clean desks").

Step-by-Step Code Walkthroughs: The docs include simplified Python snippets specifically tailored to the local Ollama implementation.

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