Add missing OJ parsers

[naimulcsx]

Currently, we only have support for Codeforces and Codechef. We need to write parsers as well as tests for the following Online Judges.

• [x] LightOJ
• [x] SPOJ
• [x] CSES
• [x] UVa
• [x] Toph
• [x] Hackerrank
• [x] AtCoder
• [x] Timus
• [x] Eolymp
• [x] LeetCode
• [x] CodeToWin
• [x] Kattis