Migrate parsers module

[naimulcsx]

We've a lib called oj-problem-parser. The initial setup is done and we've added parser for Codeforces and CodeChef in #194. Here, we'll add parsers for rest of the online judges.

• [x] Add CSES parser
• [ ] Add UVa parser
• [x] Add Toph.co parser
• [x] Add SPOJ parser
• [ ] Add HackerRank parser
• [ ] Add LightOJ parser
• [ ] Add AtCoder parser
• [ ] Add Eolymp parser
• [ ] Add LeetCode parser
• [ ] Add Timus parser
• [ ] Add CodeToWin parser
• [ ] Add Kattis parser

[naimulcsx]

We will deal with the tasks in a separate issue.