Invert a string

[me2beats]

Tip-trick:

A method to invert a string:

static func invert_string(s:String)->String:
	var chars_pool = PoolStringArray()
	var length = s.length()
	chars_pool.resize(length)
	for i in length:
		chars_pool[i] = s[i]
	chars_pool.invert()
	return chars_pool.join("")

Additional context:
it works pretty fast compared to other gdscript options
I think implementing this method in core would be useful, see godotengine/godot-proposals#3503