Tutorial: Add Radius to an existing application

[Reshrahim]

Summary

Captured as part of a usability study with first-app experience

It's unclear how much work is going to be required for me in my code. I need to see examples that give me a clearer indication of how. “I want to see how I write code that works with Radius. Give me some examples”.

Proposed action:

Add a diagram, context, and pointer to an example code file that illustrates what it will take for me to use this
The "Developing Applications" section should address this
How do I use Radius in my app
How do I connect to existing resources I am using
Etc
Linking to a sample radius app in GitHub would also be valuable

AB#8897

[Reshrahim]

@AaronCrawfis - Will this be tackled by #703 ?

[AaronCrawfis]

@AaronCrawfis - Will this be tackled by #703 ?

Yep, will consolidate the issues. Thanks!

[willtsai]

closed - #870 and radius-project/samples#626