[Feature Request] Refactor to use `api_keys_required` and `dependencies_required` decorators

[lightaime]

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Motivation

• Add error_info to decorators, to info users where to get the keys, or how to install dependencies.
• Refactor camel.models
• Refactor camel.toolkits
• Refactor camel.storages
• Refactor camel.retrievers
• Refactor camel.loaders
• Refactor camel.interpreters
• Refactor camel.loaders
• Refactor camel.embeddings
• Refactor camel.bots

Solution

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Alternatives

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Additional context

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[Homiltons]

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