[FEATURE] Allow FormatTextGenerationSFT to include tools/function calls in the formatted messages.

[plaguss]

Is your feature request related to a problem? Please describe.
With the new StructuredGeneration task we can generate datasets for function calling, and we could simplify preparing the dataset for training.

Describe the solution you'd like
Extend FormatTextGenerationSFT (FormatChatGenerationSFT too?) to include the available tools and the function calls

Describe alternatives you've considered
Let the user do it on its own.

Additional context
Use the format from Mistral function calling.