feat: csv to document row level conversion

[mdrazak2001]

Related Issues

• Enhance functionality to split CSV files by rows and convert each row into a separate document.

Proposed Changes:

Enhance the CSVToDocument component to support row-level conversion.
- Adds a 'split_by_row' parameter to convert each row of a CSV file into a separate Haystack Document.
- Retains the header row (field names) as the first line of the 'content' in each row-level Document.

How did you test it?

added unit test to existing test_csv_todocument.py

Notes for the reviewer

Checklist

• I have read the contributors guidelines and the code of conduct
• I have updated the related issue with new insights and changes
• I added unit tests and updated the docstrings
• I've used one of the conventional commit types for my PR title: fix:, feat:, build:, chore:, ci:, docs:, style:, refactor:, perf:, test: and added ! in case the PR includes breaking changes.
• I documented my code
• I ran pre-commit hooks and fixed any issue

[CLAassistant]

All committers have signed the CLA.

[Amnah199]

@mdrazak2001 Thanks for the contribution. I have requested some small changes, otherwise the PR looks good.

[coveralls]

Pull Request Test Coverage Report for Build 13658995133

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 3 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-0.01%) to 90.206%

---

Files with Coverage Reduction	New Missed Lines	%
components/converters/csv.py	3	94.74%

Totals
Change from base Build 13652854933:	-0.01%
Covered Lines:	9616
Relevant Lines:	10660

---

💛 - Coveralls

[Amnah199]

@mdrazak2001 We discussed this feature internally with the team and decided to move it to CSVDocumentSplitter, as it is a more suitable place for it.

For the linked issue, we plan to implement it in a way that provides a conversion feature:

• Map one column to the document content.
• Store all other fields as metadata, where the column name serves as the key and the column value as the corresponding value.

I'll update this PR to move the feature to CSVDocumentSplitter.