Run cells with specific language

[shay1bz]

Description

Addresses the same functionality as #598 but with some differences, this PR is for allowing users to execute cells with specific languages against the same Spark Session. Given that #598 is nearly 5 years old and seems abandoned, this implementation provides a minimal, backward-compatible solution.

Due to a lack of familiarity with the sparkmagic code base, no tests have been added. I kindly request guidance on how to implement unit tests.

The changes have been manually tested on a notebook, ensuring compatibility with shared DataFrames and UDFs between Scala and Python.

Checklist

• [x] Wrote a description of my changes above
• [x] Formatted my code with black
• [x] Added a bullet point for my changes to the top of the CHANGELOG.md file
• [ ] Added or modified unit tests to reflect my changes
• [x] Manually tested with a notebook
• [ ] If adding a feature, there is an example notebook and/or documentation in the README.md file

[shay1bz]

@devstein would you mind taking a look at this?