Report when multiple values are returned from a function implicitly

Summary of the new feature

I'd like to be able to run a command such that if I implicitly return values as well as have a return statement that it is flagged.

Ex
function fun1 { mkdir (Join-Path $env:TEMP "myFolder"); return $true }

This should produce an error/warning because mkdir (New-Item) is actually returning a value though we also explicitly return $true.

该 issue 未指定任何文件、测试或入口点。首先检查 repository 的 analyzer 和测试结构，然后确定在哪里分析隐式输出和显式 return 语句。当该示例因返回多个值而被标记，且现有行为仍由测试覆盖时，即视为完成。