Add rule no-blank-line-in-list (#1868)

* Add new experimental rule `no-blank-line-in-list` for `ktlint_official` code style

This rule disallows blank lines to be used in super type lists, type argument lists, type constraint lists, type parameter lists, value argument lists, and value parameter lists.

Closes #1224
Closes #1781

* Replace "nextSibling { true }" with "nextSibling()" and "prevSibling { true }" with "prevSibling()"
25 files changed