docs: Update Ollama integration documentation with new environment variables

- Added standard OpenAI SDK environment variables (OPENAI_BASE_URL, MODEL_NAME)
- Documented alternative patterns (OLLAMA_API_BASE) from community feedback
- Added complete usage example with praisonai --init
- Maintained backward compatibility documentation for legacy patterns

Related to MervinPraison#394 - Now users have clear documentation on how to properly
configure Ollama with the fixed environment variable support.

Author: claude[bot]

docs/models/ollama.mdx

@@ -10,8 +10,41 @@ icon: "terminal"
 
 <AccordionGroup>
   <Accordion title="Ollama Integration" defaultOpen>
+    **Standard OpenAI SDK Environment Variables (Recommended):**
     ```bash
     export OPENAI_BASE_URL=http://localhost:11434/v1
+    export MODEL_NAME=deepseek-r1:14b
+    export OPENAI_API_KEY=NA
+    ```
+    
+    **Alternative Environment Variable Patterns:**
+    ```bash
+    # Community recommended pattern
+    export OLLAMA_API_BASE=http://localhost:11434
+    export MODEL_NAME=gemma3:4b
+    export OPENAI_API_KEY=fake-key
+    
+    # Legacy pattern (still supported)
+    export OPENAI_API_BASE=http://localhost:11434/v1
+    export OPENAI_MODEL_NAME=llama2
+    export OPENAI_API_KEY=not-needed
+    ```
+    
+    **Usage with praisonai --init:**
+    ```bash
+    # Make sure Ollama is running
+    ollama serve
+    
+    # Pull your desired model
+    ollama pull deepseek-r1:14b
+    
+    # Set environment variables
+    export OPENAI_BASE_URL=http://localhost:11434/v1
+    export MODEL_NAME=deepseek-r1:14b
+    export OPENAI_API_KEY=NA
+    
+    # Initialize agents
+    praisonai --init "Create a story about AI"
     ```
   </Accordion>
 </AccordionGroup>