feat: refactor provider create functions to class attributes and update calls

- Added `create_function` and `async_create_function` class attributes with default implementations in `base_provider.py` for `AbstractProvider`, `AsyncProvider`, and `AsyncGeneratorProvider`
- Updated `get_create_function` and `get_async_create_function` methods to return these class attributes
- Replaced calls to `provider.get_create_function()` and `provider.get_async_create_function()` with direct attribute access `provider.create_function` and `provider.async_create_function` across `g4f/__init__.py`, `g4f/client/__init__.py`, `g4f/providers/retry_provider.py`, and `g4f/tools/run_tools.py`
- Removed redundant `get_create_function` and `get_async_create_function` methods from `providers/base_provider.py` and `providers/types.py`
- Ensured all provider response calls now use the class attributes for creating completions asynchronously and synchronously as needed

g4f/Provider/needs_auth/OpenaiChat.py

@@ -682,7 +682,12 @@ class OpenaiChat(AsyncAuthedProvider, ProviderModelMixin):
             page.add_handler(nodriver.cdp.network.RequestWillBeSent, on_request)
             page = await browser.get(cls.url)
             user_agent = await page.evaluate("window.navigator.userAgent", return_by_value=True)
-            while not await page.evaluate("document.getElementById('prompt-textarea')?.id"):
+            textarea = None
+            while not textarea:
+                try:
+                    textarea = await page.evaluate("document.getElementById('prompt-textarea')?.id")
+                except:
+                    pass
                 await asyncio.sleep(1)
             while not await page.evaluate("document.querySelector('[data-testid=\"send-button\"]')?.type"):
                 await asyncio.sleep(1)