New Rule Suggestion / Rule amendment - in response to #903

In Issue #903 the rule in my opinion correctly throws on a += for simple defined arrays using the $var = @() method of defining an array to the var variable

I would suggest that a new rule is created that correctly identifies this method as being an expensive action and that a recommendation to use a fully defined Array collection would be a better suggestion, initially suggesting using a System.Collections.ArrayList

This rule should look for both @() & += and suggest converting these calls better scripting practices

Comece lendo a issue #903 e a regra existente que trata += para arrays. Determine como o analisador deve reconhecer tanto @() quanto += e, em seguida, defina a recomendação e os testes necessários para confirmar que coleções totalmente definidas, inicialmente System.Collections.ArrayList, sejam sugeridas.