ll.JsonGetValue and ll.JsonSetValue still use 0-based indexing

[tapple]

print(ll.JsonGetValue('["a","b","c"]', {1})) -- "b"; expected: "a"
print(ll.JsonSetValue('["a","b","c"]', {1}, "x")) --  ["a","x","c"]; expected:  ["x","b","c"]

Just writing a reminder issue for an existing TODO:

https://github.com/secondlife/lsl-definitions/blob/2f60903adf78ad6b1474814e90255971dc367300/lsl_definitions.yaml#L8113

          # TODO: The specifiers can contain integers, which should be array indices
          # But we don't support that in the bindgen yet.
          # index-semantics: true