examples: A simple agent that can execute bash

[Mr-JingShi]

#python3 simple-agent.py
Ollama agent loop running with qwen3:4b
Type 'q' or 'exit' to quit.

Ollama-Agent >> Find all Python files in this directory
Here are all the Python files found in the current directory:

```
./web_search_gpt_oss_helper.py
./show.py
./generate-image.py
./structured-outputs-image.py
./pull.py
./chat-logprobs.py
./generate-stream.py
./list.py
./embed.py
./create.py
./chat-with-history.py
./generate.py
./tools.py
./gpt-oss-tools.py
./async-tools.py
./gpt-oss-tools-stream.py
./multimodal-chat.py
./chat-stream.py
./thinking-generate.py
./multi-tool.py
./async-generate.py
./thinking.py
./web-search-gpt-oss.py
./chat.py
./simple-agent.py
./fill-in-middle.py
./thinking-levels.py
./generate-logprobs.py
./async-chat.py
./ps.py
./web-search-mcp.py
./async-structured-outputs.py
./structured-outputs.py
./multimodal-generate.py
./web-search.py
```

This list shows all Python files (with `.py` extension) in the current directory and its subdirectories.

Ollama-Agent >> 当前git分支
The current Git branch is `main`.

Ollama-Agent >>