feat: Add GitHub Actions workflow with caching

[pranshu-saraswat]

Description:
This pull request introduces a new GitHub Actions workflow to the repository. The workflow is configured to automatically run on every push and pull request to the main and develop branches.

The main change is the addition of a caching mechanism for Python dependencies, which will significantly speed up our CI/CD process.

Key Changes:
New Workflow File: A new file, .github/workflows/python-ci.yml, has been added to the repository.

Dependency Caching: The actions/setup-python action is now configured to cache dependencies based on the contents of both requirements.txt and requirements-test.txt.

Faster Builds: By caching the pip packages, subsequent workflow runs will be much faster, as they will restore dependencies from the cache instead of reinstalling them from scratch.

This change will improve the efficiency and speed of our development pipeline without impacting how we install dependencies locally.

Related issue:
plannigan/columbo#292

Check list:

• Mark if documentation changes are required.
• Mark if tests were added or updated to cover the changes.