update API documentation with examples to list/load models (#5902)

docs/12 - OpenAI API.md

@@ -19,7 +19,7 @@ Add `--api` to your command-line flags.
 
 ### Examples
 
-For the documentation with all the parameters and their types, consult `http://127.0.0.1:5000/docs` or the [typing.py](https://github.com/oobabooga/text-generation-webui/blob/main/extensions/openai/typing.py) file.
+For the documentation with all the endpoints, parameters and their types, consult `http://127.0.0.1:5000/docs` or the [typing.py](https://github.com/oobabooga/text-generation-webui/blob/main/extensions/openai/typing.py) file.
 
 The official examples in the [OpenAI documentation](https://platform.openai.com/docs/api-reference) should also work, and the same parameters apply (although the API here has more optional parameters).
 
@@ -114,6 +114,30 @@ curl -k http://127.0.0.1:5000/v1/internal/logits \
   }'
 ```
 
+#### List models
+
+```shell
+curl -k http://127.0.0.1:5000/v1/internal/model/list \
+  -H "Content-Type: application/json"
+```
+
+#### Load model
+
+```shell
+curl -k http://127.0.0.1:5000/v1/internal/model/load \
+  -H "Content-Type: application/json" \
+  -d '{
+    "model_name": "model_name",
+    "args": {
+      "load_in_4bit": true,
+      "n_gpu_layers": 12
+    },
+    "settings": {
+      "instruction_template": "Alpaca"
+    }
+  }'
+```
+
 #### Python chat example
 
 ```python