Render adaptor functions in a picklist, display labelled text inputs for each argument

Via changes to both https://github.com/OpenFn/language-common/tree/2.0.0-pre and Lightning, draw a picklist and populate its options with all executable operations from a language package—i.e., those that return a function which takes state and returns a promise.

In common, start with fn() and http.get(), but keep an eye out for more typical use cases like create() in language-dhis2 or upsert() in language-salesforce.

For a job with a single operation, if the selected operation is "create" and it takes resourceType and attributes arguments (along with state) the UI should look like this:

For a job with multiple operations, it should gracefully degrade to show a text box: