Add Models should support selection of multiple models #5635

Prerequisites

• I have written a descriptive issue title.
• I have searched all open and closed issues to ensure it has not already been reported.
• I have read the troubleshooting guide.
• I am sure this issue is with the extension itself and does not reproduce in a standalone PowerShell instance.
• I have verified that I am using the latest version of Visual Studio Code and the PowerShell extension.
• If this is a security issue, I have read the security issue reporting guidance.

Summary

currently, when adding existing tables from the model library to a diagram, it only allows me to select a single table at a time.
It should be possible to multiselect tables and to have an option to select all or select all matching filter

PowerShell Version

Name                           Value
----                           -----
PSVersion                      7.6.6
PSEdition                      Core
GitCommitId                    7.6.6
OS                             Microsoft Windows 10.0.26200
Platform                       Win32NT
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0.}
PSRemotingProtocolVersion      2.4
SerializationVersion           1.1.0.1
WSManStackVersion              3.0

Visual Studio Code Version

1.141.0
x64

Extension Version

ms-vscode.powershell@2025.4.0

Steps to Reproduce

• open an existing diagram/model
• use [Add existing model]
• try to select multiple tables at once and add them in one go

Visuals

No response

Logs

No response