Add Azure Bicep extension

[mcollier]

Please add back the Azure Bicep extension.

The Bicep extension was included for 14 months before being recently removed (f2caeaf).

[nongaum2112]

Can i try?

[rowanlea]

Bicep now has its own extension: https://marketplace.visualstudio.com/items?itemName=ms-azuretools.vscode-bicep

I'm not sure if the snippets are as good yet, but if they were to exist anywhere, it would be here now.