feat: Added dataset_name and dataset_description params to export_notebook

[CBROWN-ONS]

Added the ability to pass the dataset_name and dataset_description to edvart.ReportBase.export_notebook. Uses the parameters in edvart.ReportBase._generate_notebook to write the dataset name and description to the notebook.
Closes #59

[mbelak-dtml]

Hi @CBROWN-ONS. Thanks for the contribution!
Just one minor thing: Please apply code style as described in the Contributing guideline.

[CBROWN-ONS]

Sorry about that @mbelak-dtml. Missed it as I was just trying to set up this account on my personal machine. The code should be properly formatted now. It also made some changes to your imports in several different files. I've left these changes in the PR as I assume that's something you'd eventually change (as it is in the contributing guidelines).

[CBROWN-ONS]

@mbelak-dtml It seems to have failed again after re-organising the imports. These were re-organised by the pre-commit style tests in the contributing guidelines.

[mbelak-dtml]

@mbelak-dtml It seems to have failed again after re-organising the imports. These were re-organised by the pre-commit style tests in the contributing guidelines.

@CBROWN-ONS I see what's wrong. There is a discrepancy between the contributing and the CI. The correct command for sorting imports is:
poetry run isort --line-length 100 --profile black edvart/ tests/
(the --line-length is missing in the contributing guideline). I opened a PR #61 fixing the contributing guideline. Could you please re-format the code using this command? After that, we can merge this PR.
Sorry about the confusion.

[CBROWN-ONS]

Hi @mbelak-dtml. Imports should be fixed now