"queue with parameters" - introduce parameter types

Hi, I think the "queue with parameters" feature would be more convenient to use if we introduce a notion of type to the parameters. Firstly, because the currently used single-line inputs are convenient only for simple string data - passing something like a JSON is inconvenient and error-prone. Secondly, because the form passes all the parameters as strings, which in turn must be parsed by the queued job - it'd be more convenient the just receive the data without any conversion.

For my personal uses, I'd need the following types

• string (the default if type is not specified) - has the current behavior
• text - renders a textarea, passes value to job as string
• json - uses some js library to render a JSON editor, passes value to job as a hash

Please let me know what do you think about this suggestion

The issue names no files, tests, or entry points. Start by tracing the existing “queue with parameters” form and how its values reach queued jobs; done means supporting string, textarea-backed text, and JSON parameters, with JSON delivered as a hash and string remaining the default.