* (GH-8964) Clarify `Write-Progress` examples

Prior to this change, the examples in the reference documentation of the
`Write-Progress` cmdlet included output showing the appearance of
progress bars in the classic view. Starting in PowerShell 7.2, which
introduced the minimal view, minimal is the default.

This change:

- Updates the examples with output to set the `$PSStyle.Progress.View`
  value to `classic` before calling `Write-Progress`
- Updates the examples to use our standard styling and limit line length
  to 100 characters.
- Resolves #8964

* Apply suggestions from code review

Co-authored-by: Sean Wheeler <sean.wheeler@microsoft.com>