Added Codeforces Contest Schedule/data

[kart2004]

Description

I have added a function and Class for retrieving Codeforces Contest data through web scraping. The data includes the title, date and length of all ongoing and upcoming contests. I have also included the necessary comments for understanding how to use the code/function.

I have used the same format as used in the leetcode and hacker rank modules for contest data.

I have updated the dev-documentation file, and created a init.py file.

Resolves: #935

Checklist

Before submitting this pull request, kindly verify that the ensuing checkpoints have been reached.

• Have you adhered to the repository's defined coding convention rules?
• Have you updated the 'documentation.md' file with the method/function documentation?
• Have you sent a message along with the result or response?
• Have you used the try-catch technique?
• Has the method/class been added to the documentation (md file)?

Screenshots

The main addition:

The final output in the format as used in other modules:

Followed the same format as the hacker rank module:

Updated the dev-documentation file:

---

I certify that I have carried out the relevant checks and provided the requisite screenshot for validation by submitting this pull request.

[nikhil25803]

Great work @kart2004 !!
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