lib: introduce Queue in standard::collection

Signed-off-by: Alexandre Terrasa <alexandre@moz-code.org>
lib: introduce Stack in standard::collection

Signed-off-by: Alexandre Terrasa <alexandre@moz-code.org>
lib: introduce Heap and PriorityQueue in standard::collection

Signed-off-by: Alexandre Terrasa <alexandre@moz-code.org>