Support repeated query parameters as an array#115

### Describe the problem Use repeated query parameters for array serialization instead of encoding an array as a single parameter: For example: `query=1&query=2&query=3` instead of `query=[1,2,3]` ### Describe the proposed solution A StoreOption to the effect of `append` to indicate that modifying the searchParams should use "append" instead of "set" and should read via "getAll" instead of "get". An empty array serializes as an absence of keys and a non-empty array serializes using the encoder on each element and storing the value in repeated query parameters