[ENH] Code and contextual QA formatters for LLM finetuning

[paxcema]

Description

Fixes mindsdb_private#394

Type of change

• ⚡ New feature (non-breaking change which adds functionality)
• 📄 This change requires a documentation update

Verification Process

To ensure the changes are working as expected:

• Added unit tests

Checklist:

• My code follows the style guidelines(PEP 8) of MindsDB.
• I have appropriately commented on my code, especially in complex areas.
• Necessary documentation updates are either made or tracked in issues.
• Relevant unit and integration tests are updated or added.

[pedrofluxa]

No comments. Clean implementation with lots of room to add more features. Good job!!

If anything, I'd add some heavy unit testing to make it absolutely bullet-proof. That is something we will be building shortly as we start using the codebase so approving the PR as-is is perfectly acceptable.

[dusvyat]

Sorry for the delay. All looks good