refactor: update providers list, env vars, and minor fixes

- **example.env**:
  - Added `G4F_API_KEY` and `G4F_PROXY` variables
  - Removed Azure-related API keys and routes block
  - Added `OLLAMA_API_KEY`, `NVIDIA_API_KEY`, and `PUTER_API_KEY`

- **g4f/Provider/EasyChat.py**:
  - Replaced `page.js_dumps` with `page.evaluate` for retrieving `guestId`

- **g4f/Provider/deprecated/LegacyLMArena.py**:
  - Changed `working = True` to `working = False`

- **g4f/Provider/deprecated/har/__init__.py**:
  - Changed `working = True` to `working = False`

- **g4f/providers/any_provider.py**:
  - Updated imports, adding `Custom`, `PollinationsImage`, `OpenaiAccount`, and reordering providers
  - Renamed `PROVIERS_LIST_2` → `PROVIDERS_LIST_2` and `PROVIERS_LIST_3` → `PROVIDERS_LIST_3`
  - Removed `PROVIERS_LIST_1` and replaced its usage with `Provider.__providers__`
  - Changed `cls.audio_models` initialization from `{}` to `[]`
  - Adjusted handling of model mapping with `clean_name` for consistency
  - GeminiPro check updated to `if provider == GeminiPro`
  - Changed final `cls.audio_models` assignment to `[ *cls.audio_models ]` instead of `list(cls.audio_models.keys())`
  - Adjusted provider fallback in `AnyProvider` to use `PROVIDERS_LIST_2 + PROVIDERS_LIST_3`

- **g4f/requests/__init__.py**:
  - Changed SSE parsing condition from `line.startswith(b"data: ")` to `line.startswith(b"data:")`
  - Updated slice from `line[6:]` to `line[5:]` when extracting `rest

example.env

@@ -1,6 +1,9 @@
 # Rename this file to .env and copy it to your cookies directory
 # Update the API_KEY and other variables as needed
 
+G4F_API_KEY=
+G4F_PROXY=
+
 HUUGINGFACE_API_KEY=
 POLLINATIONS_API_KEY=
 GEMINI_API_KEY=
@@ -9,19 +12,6 @@ DEEPINFRA_API_KEY=
 OPENAI_API_KEY=
 GROQ_API_KEY=
 OPENROUTER_API_KEY=
-AZURE_API_KEYS='{
-  "default": "",
-  "flux-1.1-pro": "",
-  "flux.1-kontext-pro": ""
-}'
-AZURE_DEFAULT_MODEL="model-router"
-AZURE_ROUTES='{
-  "model-router": "https://HOST.cognitiveservices.azure.com/openai/deployments/model-router/chat/completions?api-version=2025-01-01-preview",
-  "deepseek-r1": "https://HOST.services.ai.azure.com/models/chat/completions?api-version=2024-05-01-preview",
-  "gpt-4.1": "https://HOST.cognitiveservices.azure.com/openai/deployments/gpt-4.1/chat/completions?api-version=2025-01-01-preview",
-  "gpt-4o-mini-audio-preview": "https://HOST.cognitiveservices.azure.com/openai/deployments/gpt-4o-mini-audio-preview/chat/completions?api-version=2025-01-01-preview",
-  "o4-mini": "https://HOST.cognitiveservices.azure.com/openai/deployments/o4-mini/chat/completions?api-version=2025-01-01-preview",
-  "grok-3": "https://HOST.services.ai.azure.com/models/chat/completions?api-version=2024-05-01-preview",
-  "flux-1.1-pro": "https://HOST.cognitiveservices.azure.com/openai/deployments/FLUX-1.1-pro/images/generations?api-version=2025-04-01-preview",
-  "flux.1-kontext-pro": "https://HOST.services.ai.azure.com/openai/deployments/FLUX.1-Kontext-pro/images/edits?api-version=2025-04-01-preview"
-}'
+OLLAMA_API_KEY=
+NVIDIA_API_KEY=
+PUTER_API_KEY=