add: IndexOf, LastIndexOf and IndicesOf types

[benzaria]

this is a remake of the #1155

• IndexOf Returns the index of the first occurrence of a value in an array, or never if it is not present.
• LastIndexOf Returns the index of the last occurrence of a value in an array, or never if it is not present.
• IndicesOf Returns the indices of all the occurrences of a value in an array, or [] if it is not present.

this version added support for arrays (rest elements) so it returns a negative index if the match is behind the rest element, which will come perfect with the next plan of introducing ArrayAt type.