Docs: overview of the application logic

[thekaveman]

Based on some recent discussion and onboarding new team members, this page provides a high-level overview of all of the main phases through which the user is taken by the app.

Preview page: https://benefits-2139--cal-itp-previews.netlify.app/development/application-logic/

[github-actions]

Coverage report

This PR does not seem to contain any modification to coverable code.

[github-actions]

Preview url: https://benefits-2139--cal-itp-previews.netlify.app

[lalver1]

This looks great! 👍 I think the Entrypoint and Key supporting files call-outs work well to link the descriptions in the documentation with the code. The last diagram in the Enrollment section is also very useful given the different tokens used in this phase.
I only added one minor suggested change.

[thekaveman]

Thanks for the suggestion @lalver1, I added that in.

I also added to each of the diagrams a block for the interaction with analytics, it's helpful to see when the key events are generated in each phase.

[lalver1]

I agree, adding the interaction with analytics made the diagrams even more useful yet they still look clear.

[lalver1]

Looks good 👍

[angela-tran]

This looks great! I really like the diagrams.