…gcb (#8713)

Fixes #8519 

### Description of Change

The _System.IO.IOException: The handle is invalid._ error when using an
Invalid Platform was coming from the ShowError method when it tries to
get the Console BufferWidth. Setting a fallback value and handling the
error so that the default bw is set, even if the console has been output
redirected, makes the build at least fail gracefully. If there are other
suggested lengths or preferences feel free to let me know and I can
update it!

Additionally, I did add some code to the output message that gets
printed for enums and grabs the list of valid values if an incorrect
value is provided.

Since I was working on the CommandLineParser.cs files I did notice that
they had the old reference link for Shawn's blog. So I did update those
to point to the new locations instead of the 404s.

Updated output (not all of the Options are shown for brevity):


![image](https://github.com/user-attachments/assets/3ba0f681-e857-4a35-9642-dae9a64a7780)