Backend/149/validate company scraping config

[aniketshirodkar]

1. Added Cerberus as a dependency to the project.
2. Implemented a validation process using Cerberus to check the syntax and structure of each company's scraping configuration JSON file.
3. Integrated Cerberus validation into the program logic before the scraping process starts.

[johndpjr]

@aniketshirodkar There's some merge conflicts here - this is partly because you are merging into main instead of dev. See what merge conflicts come after changing that. VSCode has a good interface for resolving the merge conflicts.