[CLI] review exit codes sent via New3CommandResult enum

[vlada-shubina]

Since a while we were using CreationResultStatus as the exit code, which was limited only to errors on template creation. Now we have different enum: New3CommandResult which we can modify and add new statuses.

• review existing exit codes and create new codes where needed
• review sending hex as exit code - it is not supported in Unix, where exit code is limited to 8-bit integer.

[vlada-shubina]

@baronfel let's discuss this issue at one of the next meetings, particularly using hex COM codes.

We recently got #4253 on one of the code being incorrect, however it's might be a good time to change others at the same time / release.

[baronfel]

We should move to portable exit codes and document it as a breaking change for .NET 7.

[JanKrivanek]

Repositories to be touched:

• dotnet/templating PR: Adjust and document exit codes #4787
• dotnet/sdk - Inject the help link for the 127 error code
• dotnet/sdk - Attempt to inject custom help builder that would point to documentation based on given exit code
• Unify handling of missing parameter(s)/option(s) #4806
• Grace handling user requested process termination #4799
• Propagate Template Authoring errors via TemplateAuthoringException and TemplateIssueDetected status #4801