Create templates for issues (bug, feature, etc.)

[0xevn]

We need to adopt best practices for open-source development as early as possible. The good start is to create a templates for different types of issues:

• Bug
• Feature
• Enhancement
• For discussion
• QA

This will improve collaboration and will allow us to have standardized and clear issues.
We need to follow best practices of open-source community and can easily borrow this one from any project.