refactor: SPOJ

[ShivamSinghal1]

Refactoring SPOJ related code.

• Refactor all scrapers and paste them into the scraper.py file.
• Refactor all scheduled functions and paste them into the cron.py file.
• Refactor list updater for SPOJ and move it into the SPOJ app.

Some points -

1. scraper.py file must contain code to scrap the SPOJ website and get the content from it.
2. Divide code for update and save the database in other files e.g. model_utils in Codeforces app.
3. cron.py must contain all the functions that we want to schedule.

[aaradhyaberi07]

/cib

[github-actions]

Branch refactor/aaradhyaberi07/issue-90/refactor-spoj created!