feat: Add media parameter and update provider configurations

- In `PollinationsImage.py`, added a new parameter `media` of type `MediaListType` to the class method.
- Changed the default value of `aspect_ratio` in `PollinationsImage.py` from `"1:1"` to `None`.
- Updated the call to `_generate_image` in `PollinationsImage.py` to include the new `media` parameter.
- In `Local.py`, changed the `working` attribute from `True` to `has_requirements` and set `active_by_default` to `False`.
- In `Ollama.py`, set `active_by_default` to `False`.
- In `DeepSeekAPI.py`, set `active_by_default` to `has_dsk` and `needs_auth` to `True`.
- Modified the logic in `DeepSeekAPI.py` to yield `conversation` if `message_id` is present in the chunk.
- In `api.py`, added a new key `active_by_default` to the provider dictionary, determining its value based on `needs_auth`.
- In `types.py`, added a new attribute `active_by_default` to the `BaseProvider` class, initializing it to `None`.
- In `web_search.py`, added a type check for `prompt` to ensure it is a string before proceeding with the search logic.

g4f/gui/server/api.py

@@ -93,6 +93,7 @@ class Api:
             "vision": getattr(provider, "default_vision_model", None) is not None,
             "nodriver": getattr(provider, "use_nodriver", False),
             "hf_space": getattr(provider, "hf_space", False),
+            "active_by_default": not provider.needs_auth if provider.active_by_default is None else provider.active_by_default,
             "auth": provider.needs_auth,
             "login_url": getattr(provider, "login_url", None),
         } for provider in Provider.__providers__ if provider.working and safe_get_models(provider)]