[Linux] Enable Online Editing for Azure Functions

Severity:
Significant (Time Consuming)

Issue:
Currently, the Azure Functions set-up requires configuring files locally - which includes, among other steps, the need to configure the host.json file with the correct connection keys, paths and trigger types etc. Figuring out how to populate this file accurately takes a very long time and is very time consuming (see[ this issue](https://github.com/Azure/Azure-Functions/issues/1092) for an example).

Ideally, an online editor would enable users to focus on writing the meat of the code (currently in __init__.py) while not worrying configuring connections. Debugging could be done easily via automatic logging - even with complex functions that require interactions across multiple Azure services.

In my experience, a lack of an online editor significantly increased the amount of time needed to develop a Function - and most of that time was spent in ironing out the configuration files.