CommandOptions now has an IsHidden property that, when set to true, will cause the option to be hidden from the following cases:
- Help text using `-h|--help`
- Xml representations generated with the `cli xml` command
- Diagnostics displayed with the `cli explain` command
Hidden options can still be outputted with `cli explain` using the `--hidden` option that is also used to display hidden commands.
Fixes#631
If the item contained escaped markup, after the call to RemoveMarkup
the string will contain unescaped markup (that the user explicitly had
escaped before) for those cases we need to escape all remaining markup.
When running on .NET Framework, the `Should_Report_Max_Remaining_Time_For_Extremely_Small_Progress` would intermittently fail with the following error:
```
task.RemainingTime
should be
10675199.02:48:05.4775807
but was
null
```
This is because it's possible that the two increment share the same timestamp thus making the `RemainingTime` null. To ensure the two increments don't share the same timestamp, we sleep for one millisecond.
Although I have only observed this issue on .NET Framework it would be possible that it occasionally also occur on .NET Core.
Test rending a table with East Asia characters (Chinese, Japanese, Korean).
The verified text file may look weird, but it looks normal and correctly in Console (tested in Windows Terminal, Terminal.app in macOS Monterey)
