Update CSV cmdlet -Delimiter parameter description

[surfingoldelephant]

PR Summary

This PR clarifies the deserialization behavior when the specified delimiter doesn't match the actual delimiter in the input data. Before this change, the verbiage for Import/ConvertFrom-Csv -Delimiter was ambiguous, potentially suggesting output wouldn't be a custom object if the wrong delimiter is used.

In addition, this adds a note regarding special character double-quoting to all docs. Previously, the note was only present in the Import-Csv docs, but it's applicable to/useful for all CSV cmdlet -Delimiter descriptions.

There are also minor style/formatting changes.

PR Context

$output = @'
H1,H2,H3
V1,V2,V3
V1,V2,V3
'@ | ConvertFrom-Csv -Delimiter ';'

$output[0].GetType().Name
# PSCustomObject

$output[0].'H1,H2,H3'
# V1,V2,V3

This also applies to:

• -Delimiter isn't specified and , isn't used in the input.
• -UseCulture is specified and the delimiter used in the input doesn't match the current culture's.

PR Checklist

• Descriptive Title: This PR's title is a synopsis of the changes it proposes.
• Summary: This PR's summary describes the scope and intent of the change.
• Contributor's Guide: I have read the contributor's guide.
• Style: This PR adheres to the style guide.

[learn-build-service-prod]

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[learn-build-service-prod]

Learn Build status updates of commit afa22b4:

✅ Validation status: passed

File	Status	Preview URL	Details
reference/5.1/Microsoft.PowerShell.Utility/ConvertFrom-Csv.md	✅Succeeded	View (powershell-5.1)
reference/5.1/Microsoft.PowerShell.Utility/ConvertTo-Csv.md	✅Succeeded	View (powershell-5.1)
reference/5.1/Microsoft.PowerShell.Utility/Export-Csv.md	✅Succeeded	View (powershell-5.1)
reference/5.1/Microsoft.PowerShell.Utility/Import-Csv.md	✅Succeeded	View (powershell-5.1)
reference/7.4/Microsoft.PowerShell.Utility/ConvertFrom-Csv.md	✅Succeeded	View (powershell-7.4)
reference/7.4/Microsoft.PowerShell.Utility/ConvertTo-Csv.md	✅Succeeded	View (powershell-7.4)
reference/7.4/Microsoft.PowerShell.Utility/Export-Csv.md	✅Succeeded	View (powershell-7.4)
reference/7.4/Microsoft.PowerShell.Utility/Import-Csv.md	✅Succeeded	View (powershell-7.4)
reference/7.5/Microsoft.PowerShell.Utility/ConvertFrom-Csv.md	✅Succeeded	View (powershell-7.5)
reference/7.5/Microsoft.PowerShell.Utility/ConvertTo-Csv.md	✅Succeeded	View (powershell-7.5)
reference/7.5/Microsoft.PowerShell.Utility/Export-Csv.md	✅Succeeded	View (powershell-7.5)
reference/7.5/Microsoft.PowerShell.Utility/Import-Csv.md	✅Succeeded	View (powershell-7.5)
reference/7.6/Microsoft.PowerShell.Utility/ConvertFrom-Csv.md	✅Succeeded	View (powershell-7.6)
reference/7.6/Microsoft.PowerShell.Utility/ConvertTo-Csv.md	✅Succeeded	View (powershell-7.6)
reference/7.6/Microsoft.PowerShell.Utility/Export-Csv.md	✅Succeeded	View (powershell-7.6)
reference/7.6/Microsoft.PowerShell.Utility/Import-Csv.md	✅Succeeded	View (powershell-7.6)

For more details, please refer to the build report.