Add Unit Tests for Semantic Versioning Script

[aatmanvaidya]

The semantic versioning script is a critical part of the Feluda project, handling versioning for multiple Python packages in a monorepo setup. To ensure its reliability and maintainability, we need to add comprehensive unit tests for all functions in the script.

Link to the script - link

• Write unit tests for each function in the script. Handle both cases where the function will pass and where will it fail
• write the test at tests/scripts/ folder
• The script requires a range of commits to be passed to them. We will have to create a way that allows the test to be written on dummy commits.
• Finally, also write a end-to-end test for this, where all functions are used.

We can also think of using testing frameworks pytest alongisde uv, instead of just using the python in-build unittest framework.