Support parsing query parameters into the `${params}` object

[vordimous]

Describe the desired outcome from the user's perspective As an API admin I need to add more dynamic parameters to a URL query by passing in different query parameters.

Acceptance criteria

• Parse supported URL query parameters into the ${params} object
• Create mechanisms to determine when a parameter is empty or missing
• Handle arrays and allow mapping them to lists in the zilla.yaml

Additional context /topic?keys=key1,keys=key2,keys=key3 would result in a filter:

      with:
        capability: fetch
        topic: items-snapshots
        filters:
          - key: key1
          - key: key2
          - key: key3