[FEA] Create intermediate representation (IR) from code source

[miguelusque]

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When training an LLM on code-related tasks, it has been empirically proven that paring source code with its intermediate representation (IR) improves the LLM capabilities (https://arxiv.org/abs/2403.03894).

Adding this capability to NeMo Curator would be, IMHO, useful,

Hope it helps! Miguel