[New] Set up location-driven geotriggers

[CalebRas]

Description

This PR implements Set up location-driven geotriggers in Display information category.
URL to README: https://github.com/Esri/arcgis-maps-sdk-swift-samples/tree/Caleb/New-SetUpLocationDrivenGeotrigers/Shared/Samples/Set%20up%20location-driven%20geotriggers

Linked Issue(s)

• swift/issues/4135

How To Test

• Watch the location display move and the status texts change accordingly.
• Tap the "Current Section" button to see the current section information when available.
• Tap the "Point of Interest" button to see the point of interest information when available.

Screenshots

[yo1995]

First batch of comments.

[yo1995]

Getting into the concurrency deep water! 🎣

[yo1995]

Here are some docs changes. I'll add more feedback on the data model soon.

[yo1995]

Instead of making separate comments, I decided to stash my suggestions on a branch. Here are the compared branches: https://github.com/Esri/arcgis-maps-sdk-swift-samples/compare/Caleb/New-SetUpLocationDrivenGeotrigers...Ting/GeotriggerSuggestions?expand=1

We can discuss these suggestions in detail. Once we are all good, you can merge it into your branch locally and update the PR. Or if you want me to comment on the changes on GitHub, feel free to open a PR targeting your branch and I can add the comments on their lines.

[yo1995]

Hi @mhdostal if you have a chance can you review this PR? Or assign to someone else using the sample reviewers alias.

[mhdostal]

Looks great, very nice work!