Implement foreach loops with local key, value pairs

[mathiasvatter]

Feature Description lua/python type for each loop for arrays

Problem it Solves More user friendly array iteration

Proposed Solution Syntactic Sugar:

declare note_id[128] := (10)
for _, value in node_id
    message(value)
end for

Desugared:

for _ := 0 to num_elements(node_id)-1
    message(node_id[_])
end for

[mathiasvatter]

Added in v0.0.3