Accept `-Fix` for `-ScriptDefinition`

Summary of the new feature

Currently the -Fix parameter is mutual exclusive with the -ScriptDefinition parameter:

Invoke-ScriptAnalyzer -ScriptDefinition 'GCI *' -Fix

Invoke-ScriptAnalyzer: Parameter set cannot be resolved using the specified named parameters. One or more parameters issued cannot; be used together or an insufficient number of parameters were provided.

Proposed technical implementation details (optional)

When both ( -Fixand -ScriptDefinition) parameters, are supplied, I would expect to get a fixed ScriptDefinition back (instead of a [Microsoft.Windows.PowerShell.ScriptAnalyzer.Generic.DiagnosticRecord]).
This way, it would be easier to (pester) test a rule with SuggestedCorrections.
(You might of cause check the SuggestedCorrections property but that will not confirm it has been correctly inserted in the script.)
Besides it will allow to fix scripts by creating a fixed copy rather than make sure that you have a backup of your files when using this parameter.

Wishful thinking:

Get-Content *.ps1 | Foreach-Object { Invoke-ScriptAnalyzer -ScriptDefinition $_ | Set-Content "Fixed\$($_.Name)" }

What is the latest version of PSScriptAnalyzer at the point of writing

1.21.0

Start by reviewing the Invoke-ScriptAnalyzer entry point and its current handling of -ScriptDefinition and -Fix. Verify how the command currently returns diagnostics, then define coverage for accepting both parameters, returning the fixed script definition, and confirming SuggestedCorrections are applied.