Add option to upload semicolon separated csv files in metadata import step

[Elena-kal]

Description

fixes #450
We now have a checkbox that the user has to unselect to upload a semicolon separated csv.

Changes

Changed the file import and the form for the metadata upload.

Testing

Create a standard workflow and upload the semicolon separated csv which you can find in the nextcloud.
Of course, make sure to unselect the comma separated checkbox.

PR checklist

Development

• If necessary, I have updated the documentation (README, docstrings, etc.)
• If necessary, I have created / updated tests.

Mergeability

• main-branch has been merged into local branch to resolve conflicts
• The tests and linter have passed AFTER local merge
• The backend code has been formatted with black
• The frontend code has been formatted with pnpm format and checked with pnpm lint

Code review

• I have self-reviewed my code.
• At least one other developer reviewed and approved the changes

[github-actions]

Coverage report

Click to see where and how coverage changed

File	Statements	Missing	Coverage	Coverage (new stmts)	Lines missing
backend/protzilla/importing
example_dataset_import.py
metadata_import.py					24-29, 65, 120-121
backend/protzilla/methods
importing.py
Project Total

This report was generated by python-coverage-comment-action

[jorisfu]

Generally agree but I think we should make this more general, maybe add a dropdown with comma, tab, and semicolon, should be fairly simple to pass to the sep argument

[Elena-kal]

Generally agree but I think we should make this more general, maybe add a dropdown with comma, tab, and semicolon, should be fairly simple to pass to the sep argument

Done

[jorisfu]

yes