Add notebook blob viewer

What does this MR do and why?

Adds a notebook blob viewer to fix the bug that prevented notebooks from being rendered when stored in LFS.

Screenshots or screen recordings

before	after

How to set up and validate locally

1. Configure Git LFS for .ipynb files
2. Commit a Jupyter Notebook file sample
3. Open the notebook file via the Repository files browser
4. The file should be rendered as expected

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #385035 (closed)