Tuneapi

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- Added usage tracking for OpenAI and Anthropic

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- Typo so now we are in 8.x.x series
- Fix bug in structured generation for ``Openai``.

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- Adding multimodal support for OpenAI and Gemini endpoints.
- Added new types for the new endpoints, etc.
- New utils function ``file_size`` to get the size of the file in bytes.

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- Remove ``model_tune.py``, ``model_groq.py`` and ``model_mistral.py`` and subclass those models from ``Openai``.

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- Fix bug in image modality for Gemini
- Fix bug in structured generation for OpenAI by setting ``strict=True`` in the API.
- Fix bug in structured generation for Gemini
- Abstracted making input structure for ``Anthropic``, ``OpenAI`` and ``Gemini`` using ``_process_input`` method
- Abstracted outputs for ``Anthropic``, ``OpenAI`` and ``Gemini`` using ``_process_output`` method

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- Add image modality for Gemini and OpenAI to complement Anthropic.