Added Dapr Jobs .NET Quickstart

[WhitWaldo]

Description

Do not merge yet:
README is incomplete until this bug can be resolved.

Issue reference

N/A - part of 1.15 endgame

Checklist

Please make sure you've completed the relevant tasks for this PR, out of the following list:

• The quickstart code compiles correctly
• You've tested new builds of the quickstart if you changed quickstart code
• You've updated the quickstart's README if necessary
• If you have changed the steps for a quickstart be sure that you have updated the automated validation accordingly. All of our quickstarts have annotations that allow them to be executed automatically as code. For more information see mechanical-markdown. For user guide with examples see Examples.

[paulyuk]

Please see comments

[paulyuk]

what do you think about using the "http proxy" approach to invoking the http call instead like we do in the basic service invoke quickstart? https://docs.dapr.io/getting-started/quickstarts/serviceinvocation-quickstart/

that shows you can keep using your favorite HTTP client and just pass a header, making dapr look a bit more familiar.

[paulyuk]

Also can we sync to release-1.15 and try to get these C# checks to pass?

[WhitWaldo]

As this was the SDK quickstart, I opted to use the SDK-style service invocation instead of HttpClient as I figured that was better featured in the HTTP quickstart.

A sync to release-1.15 does not appear to be in the cards for me until all my PRs are closed. As best I can tell I'm going to have to delete my GitHub fork and re-create it to get it to sync anything but master (as it's the only branch I originally forked).