feat: add model alias handling and update Cloudflare provider

- Introduced `clean_name` function in `Cloudflare.py` to format model names by removing specific suffixes.
- Updated `model_aliases` in `Cloudflare` class with new model mappings, and cleaned up redundant entries.
- Set `models` in the `Cloudflare` class to use keys from `model_aliases`.
- Adjusted the caching logic in `Cloudflare` to include new headers for requests.
- Added `parent` and `login_url` attributes in `DeepInfraChat` class.
- Updated `PollinationsAI` to clean up model retrieval logic and fixed handling of existing checks.
- Refactored `HarProvider` to inherit models and aliases from `LegacyLMArena`.
- Implemented loading environment variables from `.env` file in `cookies.py`.
- Updated default headers in `defaults.py` for user agent and `sec-ch-ua`.
- Cleaned up various model references in `any_model_map.py` to reflect differences in audio, vision, and other model types.
- Added a more centralized handling for API key management in `run_tools.py` to accommodate new nomenclature.
- Enhanced existing logic to allow for more granular loading and utilization of API keys from environment variables.

g4f/cookies.py

@@ -49,7 +49,7 @@ from . import debug
 
 class CookiesConfig():
     cookies: Dict[str, Cookies] = {}
-    cookies_dir: str = CUSTOM_COOKIES_DIR if os.path.exists(CUSTOM_COOKIES_DIR) else COOKIES_DIR
+    cookies_dir: str = CUSTOM_COOKIES_DIR if os.path.exists(CUSTOM_COOKIES_DIR) else str(COOKIES_DIR)
 
 DOMAINS = [
     ".bing.com",
@@ -135,6 +135,13 @@ def read_cookie_files(dirPath: str = None):
         debug.log(f"Read cookies: {dirPath} dir is not readable")
         return
 
+    try:
+        from dotenv import load_dotenv
+        load_dotenv(os.path.join(dirPath, ".env"), override=True)
+        debug.log(f"Read cookies: Loaded environment variables from {dirPath}/.env")
+    except ImportError:
+        debug.error("Warning: 'python-dotenv' is not installed. Environment variables will not be loaded.")
+
     def get_domain(v: dict) -> str:
         host = [h["value"] for h in v['request']['headers'] if h["name"].lower() in ("host", ":authority")]
         if not host: