Add some custom examples

modules/ai/README.md

@@ -9,3 +9,19 @@ OpenAI and Ollama Clients
   - Default model can be overridden using `--model`
 - Importing and exporting of Ollama models
 - Connection details managed through environment variables
+
+Control some options with the following code.
+```
+$env.OLLAMA_HOST = 'http://localhost:11434'
+$env.OPENAI_HOST = 'http://localhost:11434'
+$env.OPENAI_API_KEY = 'secret'
+$env.OPENAI_PROMPT = $env.OPENAI_PROMPT
+| insert 'json2rust' {
+    prompt: [
+        "Analyze the following JSON data to convert it into a Rust struct:"
+        "```{}```"
+    ]
+    model: '',
+    description: 'Analyze JSON content, converting it into a Rust struct'
+}
+```