Include Type Constraints for Input fields

[samaraaugust]

Implement way to appropriately set the input type of the parameters. For example,

for the sleep plan I added an array for the time but it should be a number.
For now, the web client allows users to input whatever they want and by using JSON.parse, it parses the string or object into what it best believes the type should be however, there are some limitations to using the function for example the string value 'hey' or `hey` would not be accepted because JSON.parse does not read single quotes or backticks but it allows double quotes. So, finding a better way to parse the object would be significant improvement to the overall logic handling of the web client.

[prjemian]

JSON: "some text" is stringified as \"some text\"

In other languages, this is called marshalling or serializing.

[prjemian]

type annotation for the*args in the scan plan might be (ideally)

List[Tuple[object, float, float]]

[prjemian]

See this python import (which means there is a package for this):

from typing import Optional, Tuple, Type

[prjemian]

examples from here: https://github.com/bluesky/ophyd/blob/master/ophyd/v2/epics.py