add support for C# (csharp)

[championswimmer]

• add the docker container and compile + run scripts here
• add run spec test on taskmaster add csharp run spec  judge-taskmaster#10

[kapillamba4]

Pull request for this issue: #6

[championswimmer]

note the bounty is subject the completition of both the sub tasks

[aggarwalpulkit596]

Pr for this issue #9 and sub part of this pr coding-blocks/judge-taskmaster#13

[championswimmer]

sorry running busy. i'll take a look at the prs by tomorrow