Basic integration for Azure Web PubSub Service

[xingsy97]

Extension for Azure Web PubSub service is under developing.
Add basic integration for it.

[xingsy97]

@microsoft/vscodeazuretoolsdev

[alexweininger]

Do you have a link to the source code of the extension?

[xingsy97]

@alexweininger All comments are resolved. I accidentally updated the branch for my personal test use several days ago.
We haven't publish the package code publicly, for the unsolved question I asked you whether the code could be put into our all-in-one repo https://github.com/azure/azure-webpubsub

[alexweininger]

for the unsolved question I asked you whether the code could be put into our all-in-one repo https://github.com/azure/azure-webpubsub

It's fine if the code is located in an all-in-one repo. Our team probably prefers it to be stand alone, but it's fine either way. For example, the AZD extension is located in an all-in-one repo. https://github.com/Azure/azure-dev/tree/main/ext/vscode