Ollama Support

I love your project, I want to use it with local ollama+llava and i tried many way including asking chat gpt.
I am on Windows 11, i tried docker and no go. changed api address from settings in frontend also
```
api key as "ollama" and
Api Url as http://localhost:11434/v1/
```
and i tested my local ollama+llava answering and running with postman.

changed frontend\src\lib\models.ts

```
// Keep in sync with backend (llm.py)
// Order here matches dropdown order
export enum CodeGenerationModel {
GPT_4O_2024_05_13 = "llava", --> HERE
GPT_4_TURBO_2024_04_09 = "gpt-4-turbo-2024-04-09",
GPT_4_VISION = "gpt_4_vision",
CLAUDE_3_SONNET = "claude_3_sonnet",
}

// Will generate a static error if a model in the enum above is not in the descriptions
export const CODE_GENERATION_MODEL_DESCRIPTIONS: {
[key in CodeGenerationModel]: { name: string; inBeta: boolean };
} = {
"llava": { name: "LLava", inBeta: false }, --> and here
"gpt-4-turbo-2024-04-09": { name: "GPT-4 Turbo (Apr 2024)", inBeta: false },
gpt_4_vision: { name: "GPT-4 Vision (Nov 2023)", inBeta: false },
claude_3_sonnet: { name: "Claude 3 Sonnet", inBeta: false },
};

```
also backend\llm.py

# Actual model versions that are passed to the LLMs and stored in our logs
```
class Llm(Enum):
GPT_4_VISION = "gpt-4-vision-preview"
GPT_4_TURBO_2024_04_09 = "gpt-4-turbo-2024-04-09"
GPT_4O_2024_05_13 = "llava"
CLAUDE_3_SONNET = "claude-3-sonnet-20240229"
CLAUDE_3_OPUS = "claude-3-opus-20240229"
CLAUDE_3_HAIKU = "claude-3-haiku-20240307"

Will throw errors if you send a garbage string
def convert_frontend_str_to_llm(frontend_str: str) -> Llm:
if frontend_str == "gpt_4_vision":
return Llm.GPT_4_VISION
elif frontend_str == "claude_3_sonnet":
return Llm.CLAUDE_3_SONNET
elif frontend_str == "llava":
return Llm.GPT_4O_2024_05_13
else:
return Llm(frontend_str)
```
console and backend errors below

```
INFO: ('127.0.0.1', 57364) - "WebSocket /generate-code" [accepted]
Incoming websocket connection...
INFO: connection open
Received params
Generating html_tailwind code for uploaded image using Llm.GPT_4O_2024_05_13 model...
Using OpenAI API key from client-side settings dialog
Using OpenAI Base URL from client-side settings dialog
generating code...
ERROR: Exception in ASGI application
Traceback (most recent call last):
File "C:\Users\k\AppData\Local\pypoetry\Cache\virtualenvs\backend-bYKjg4sG-py3.11\Lib\site-packages\uvicorn\protocols\websockets\websockets_impl.py", line 250, in run_asgi
result = await self.app(self.scope, self.asgi_receive, self.asgi_send)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\k\AppData\Local\pypoetry\Cache\virtualenvs\backend-bYKjg4sG-py3.11\Lib\site-packages\uvicorn\middleware\proxy_headers.py", line 84, in __call__
return await self.app(scope, receive, send)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\k\AppData\Local\pypoetry\Cache\virtualenvs\backend-bYKjg4sG-py3.11\Lib\site-packages\fastapi\applications.py", line 276, in __call__
await super().__call__(scope, receive, send)
File "C:\Users\k\AppData\Local\pypoetry\Cache\virtualenvs\backend-bYKjg4sG-py3.11\Lib\site-packages\starlette\applications.py", line 122, in __call__
await self.middleware_stack(scope, receive, send)
File "C:\Users\k\AppData\Local\pypoetry\Cache\virtualenvs\backend-bYKjg4sG-py3.11\Lib\site-packages\starlette\middleware\errors.py", line 149, in __call__
await self.app(scope, receive, send)
File "C:\Users\k\AppData\Local\pypoetry\Cache\virtualenvs\backend-bYKjg4sG-py3.11\Lib\site-packages\starlette\middleware\cors.py", line 75, in __call__
await self.app(scope, receive, send)
File "C:\Users\k\AppData\Local\pypoetry\Cache\virtualenvs\backend-bYKjg4sG-py3.11\Lib\site-packages\starlette\middleware\exceptions.py", line 79, in __call__
raise exc
File "C:\Users\k\AppData\Local\pypoetry\Cache\virtualenvs\backend-bYKjg4sG-py3.11\Lib\site-packages\starlette\middleware\exceptions.py", line 68, in __call__
await self.app(scope, receive, sender)
File "C:\Users\k\AppData\Local\pypoetry\Cache\virtualenvs\backend-bYKjg4sG-py3.11\Lib\site-packages\fastapi\middleware\asyncexitstack.py", line 21, in __call__
raise e
File "C:\Users\k\AppData\Local\pypoetry\Cache\virtualenvs\backend-bYKjg4sG-py3.11\Lib\site-packages\fastapi\middleware\asyncexitstack.py", line 18, in __call__
await self.app(scope, receive, send)
File "C:\Users\k\AppData\Local\pypoetry\Cache\virtualenvs\backend-bYKjg4sG-py3.11\Lib\site-packages\starlette\routing.py", line 718, in __call__
await route.handle(scope, receive, send)
File "C:\Users\k\AppData\Local\pypoetry\Cache\virtualenvs\backend-bYKjg4sG-py3.11\Lib\site-packages\starlette\routing.py", line 341, in handle
await self.app(scope, receive, send)
File "C:\Users\k\AppData\Local\pypoetry\Cache\virtualenvs\backend-bYKjg4sG-py3.11\Lib\site-packages\starlette\routing.py", line 82, in app
await func(session)
File "C:\Users\k\AppData\Local\pypoetry\Cache\virtualenvs\backend-bYKjg4sG-py3.11\Lib\site-packages\fastapi\routing.py", line 289, in app
await dependant.call(**values)
File "C:\Users\k\screenshot-to-code\backend\routes\generate_code.py", line 262, in stream_code
completion = await stream_openai_response(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\k\screenshot-to-code\backend\llm.py", line 60, in stream_openai_response
stream = await client.chat.completions.create(**params) # type: ignore
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\k\AppData\Local\pypoetry\Cache\virtualenvs\backend-bYKjg4sG-py3.11\Lib\site-packages\openai\resources\chat\completions.py", line 1334, in create
return await self._post(
^^^^^^^^^^^^^^^^^
y\Cache\virtualenvs\backend-bYKjg4sG-py3.11\Lib\site-packages\openai\_base_client.py", line 1532, in _request
raise self._make_status_error_from_response(err.response) from None
openai.BadRequestError: Error code: 400 - {'error': {'message': 'json: cannot unmarshal array into Go struct field Message.messages.content of type string', 'type': 'invalid_request_error', 'param': None, 'code': None}}
INFO: connection closed
```

If can be use on local server it'll be awesome!
Thanks for consideration