Add no-blank-line-before-single-return rule to the lint analyzers

[byshy]

This rule is highly inspired from the newline-before-return rule, I wanted to make it so that the code is structured the same everywhere in our projects and make the review process shorter and actually focus on what matters

[santitigaga]

@byshy, great job.
Please add this new rule in the documentation in the gh-pages-source branch