Documentation Update

I think the documentation for the project may need a few updates.

Most visible example:
Command: starcli -d this-week -L table
Error: Invalid value for '--date-range' / '-d': invalid choice: this-week. (choose from day, week, month)

The argument "this-week" is not valid for "-d" option as of the latest version, only day/week/month are working.

This is just an example, which I assume was being used as a proper command in the earlier versions, but it is not working now.
Also, the README.md file was updated 2 years ago, so I am assuming you have at least some catching up to do with the new features/updates being added since then, if any.

I don't think this is a "bug" or a "feature request" specifically, so I opened this as a blank issue, thinking it can be labelled as "documentation".
If you have any particular things to be added in the documentation (along with the above update), I would love to work on this.

Start with README.md and compare its command examples with the current starcli option behavior, especially `-d`/`--date-range`. Confirm which date-range values work, update the invalid `this-week` example, and bring other clearly outdated documentation in line with current features.

Written by the indexing model from the issue text.