Automatically inject the installed python into the path after install.

[AraHaan]

Is your feature request related to a problem? Please describe.
The problem I have is that when I tell the python install manager to install a specific version of python (say 3.14.2 for example) it does not automatically add that folder for that version of python to the PATH along with its Scripts subfolder. This is an option in the GUI in the traditional exe installers for each python version that I would love the install manager to have available by default.

Describe the solution you'd like
Have it to where one when installs a version of python that it's folder and the Scripts subfolder is automatically appended to the PATH environment variable so pip can shut up on the warnings about Scripts installed from say installing meson-python can be silenced for good.

Describe alternatives you've considered
Adding them manually could be an option using setx PATH until your PATH is > 1024 characters long and the annoying tool just truncates it (I personally think truncating an environment variable to 1024 characters long is dumb) and completely messes up your PATH in the process.

Additional context
I doubt any additional information is required atm. Let me know if you need more information as this is a quite annoying issue that I would like the install manager to handle and fix properly without messing up someone's PATH in the process.