Add document drop handler and telemetry

[bwateratmsft]

Related to #1389, adds a special new feature just for @savannahostrowski and @gkulin. Drag a folder into azure.yaml and hold Shift before releasing--it will automatically add a service to your azure.yaml file, with tab stops at the project language and host and enums to help select the right values in those places.

This feature is admittedly pretty gimmicky but I thought it looked neat.

[karolz-ms]

The code looks great, but I have doubts about the cost/risk/benefit tradeoff of this change.

Discoverability of the feature is terrible. Utility is marginal at best given that azure.yaml already has a good schema/syntax hinting, and that the initial output often needs tweaking. Not a lot of code admittingly, but is the overall user benefit high enough to offset the cost of testing and maintenance?

[savannahostrowski]

I'm playing catch up now that I'm back from vacation. Oh this is super cool! I think that this will definitely be helpful to some folks who really struggle with paths. I don't disagree with Karol re. discoverability but tbh, there are loads of valuable features in VS Code with poor discoverability (basically all VS Code settings 🙂)

Can we instrument telemetry around this so we can monitor how often it's being used/triggered?

[bwateratmsft]

Discoverability of the feature is terrible.

Absolutely agreed. Especially since you have to hold Shift to even get the options to show when dropping. Not a common paradigm at all.

Utility is marginal at best given that azure.yaml already has a good schema/syntax hinting, and that the initial output often needs tweaking. Not a lot of code admittingly, but is the overall user benefit high enough to offset the cost of testing and maintenance?

I thought of this more as a fun feature to show off in demos than to actually be seriously useful to end users. If it starts presenting itself as a maintenance problem, I wouldn't hesitate to drop it.

[bwateratmsft]

Can we instrument telemetry around this so we can monitor how often it's being used/triggered?

Yes, and in fact I think I'll add some additional telemetry on the other language features as well.

[savannahostrowski]

I thought of this more as a fun feature to show off in demos than to actually be seriously useful to end users. If it starts presenting itself as a maintenance problem, I wouldn't hesitate to drop it.

Yeah - makes sense to me. With telemetry, we can see if it's really a useful feature for folks to have/worth the maintenance.

[azure-sdk]

VSCode Extension Installation Instructions

1. Download the extension at https://azuresdkreleasepreview.blob.core.windows.net/azd/vscode/pr/2448/azure-dev-0.7.0-alpha.1.vsix
2. Extract the extension from the compressed file
3. In vscode
   a. Open "Extensions" (Ctrl+Shift+X)
   b. Click the ...\ menu at top of Extensions sidebar
   c. Click "Install from VSIX"
   d. Select location of downloaded file

[savannahostrowski]

@esweet431 as FYI for new feature + telemetry