Added Quickstart for Javascript Jobs HTTP api

[ConstantinChirila]

Description

Added the missing quickstart for how to use the Dapr Jobs with Javascript through standard http fetch.

Issue reference

We strive to have all PRs being opened based on an issue, where the problem or feature have been discussed prior to implementation.

Please reference the issue this PR will close: #1112

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.

[alicejgibbons]

Needs to be tested without the multi-app run files and with the single dapr commands.

[ConstantinChirila]

Needs to be tested without the multi-app run files and with the single dapr commands.

Thank you for the comments @alicejgibbons.
I have addressed your comments and also ran the apps with single Dapr commands.

[alicejgibbons]

Do you need a step for stopping the dotnet multi app run file?