Add A DSU data Structure Implementation in GoLang

[KalshuCodes]

I have implemented Disjoint Set Union in GoLang.
Wanted to Contribute here.

[vdnhi]

You're welcome. Let create a Pull request and assign me to review. Thank you.

[KalshuCodes]

I created a Pull Request #186 @nomisrevol . Also due to multiple main declarations in Levenstein Distance, all recent Pull Request tests are getting failed.