[Feature] `blank_line_before_statement`

[ALameLlama]

I'd like to have something similar to php-cs-fixer where you can add a blank line above statements when they're on the same indentation level.

e.g
before

local function parse(input)
    if #input < 1 then
        return false
	end
    return true
end

after

local function parse(input)
    if #input < 1 then
        return false
	end

    return true
end

or
before

local a = 9000
if true then
    foo = bar
end

after

local a = 9000

if true then
    foo = bar
end

there are more examples in the link provided (granted they are in php)