Documentation missing for PowerShell Containers on AWS Lambda

I was going through the documentation for AWS Lambda and noticed that there isn't any documentation for PowerShell Containers on Lambda. According to the Lambda Containers announcement, all Lambda runtimes are supported with containers. Is that true for PowerShell?

I also tried to run `pwsh` from the "dotnet" container image on the AWS public ECR gallery. It doesn't appear to be installed in the dotnet image, so how would I package up a PowerShell container for Lambda?

```
PS > docker run --rm -it --entrypoint sh public.ecr.aws/lambda/dotnet
sh-4.2# ls
sh-4.2# dotnet

Usage: dotnet [options]
Usage: dotnet [path-to-application]

Options:
-h|--help Display help.
--info Display .NET information.
--list-sdks Display the installed SDKs.
--list-runtimes Display the installed runtimes.

path-to-application:
The path to an application .dll file to execute.
sh-4.2# pwsh
sh: pwsh: command not found
```

Notice how the documentation for Lambda Containers skips over PowerShell, but exists for other languages, in the following screenshot.


Inizia dalla documentazione esistente sui container AWS Lambda e dalle indicazioni sul runtime PowerShell a cui fa riferimento l’issue, quindi verifica il comportamento dell’immagine public.ecr.aws/lambda/dotnet mostrato nell’esempio. Il lavoro è completo quando la documentazione spiega se i container PowerShell sono supportati e, in caso affermativo, come crearne il pacchetto; altrimenti, deve documentare chiaramente la limitazione.

Scritto dal modello di indicizzazione a partire dal testo della issue.