[Feature Request]:Add datetime widgets for humans to query range data

Problem description
Querying redis timeseries using expects you to have the unix timestamps to bounding your ts.range query. This is poor UX considering that humans generally deal with human-readable timestamps. A simple widget to pick the datetime could save so many people so much time.

How often do you encounter this problem

Every single time. When I want to look at data from...
"last Monday to Wednesday"
"3pm to 6pm today"
"the last 5 minutes"
I have to figure out the exact unix timestamps for that range first. Thats too much friction from a user experience (db admin).
I have to use external tools to convert my dates to unix timestamps in order to start have the bounds to do my query. Could have been just a widget within the workbench that takes my human-readable datetimes and converts them to unix timestamp under the hood.

Alternatives considered
https://www.unixtimestamp.com/
https://www.epochconverter.com/

Start by reviewing RedisInsight's existing Redis time-series range-query workflow and identifying where users enter the Unix timestamp bounds. Define which human-readable inputs and relative ranges must be supported, then verify that the widget produces equivalent query bounds and works for the examples in the issue.