`poetry show --solve` or enhance `--why`

• I have searched the issues of this repo and believe that this is not a duplicate.
• I have searched the documentation and believe that my question is not covered.

Feature Request

Related: https://discord.com/channels/487711540787675139/487711540787675143/1015462018767147030

I want to see what is indirectly constraining my dependency from updating, whether that is my Python version or some other package. An example of usage would be to see why a package isn't being updated to the latest version seen on PyPi.

A format like https://discord.com/channels/487711540787675139/487711540787675143/1015470135663939614 would be nice

poetry show foo --solve:

Project requires foo >=4.2,<69
bar adds constraint <=50, union is now >=4.2,<=50
baz adds constraint >49, union is now 50
Selecting version 50 of package foo because of unified constraint >49,50

or
poetry show numpy --why --solve:

Project requires transformers which requires numpy >= 1.21.0
Latest version of numpy (1.22.2) requires Python >=3.8,<4.0, incompatible with current version (Python >=3.7,<4.0)
numpy 1.21.5 works.
Selecting version 1.21.5 of numpy because it works lol

Start with the poetry show --solve and poetry show numpy --why --solve entry points described in the issue, and review how dependency constraints and package versions are currently presented. Done means the command explains indirect constraints and version selection in a format comparable to the examples, including Python-version incompatibilities.