Needs a "Getting Started" guide.

We need a good "Getting Started" markdown guide. This should guide the user through setting up redux-capacitor against an existing REST api from start to finish, detailing edge cases.

This guide should be thorough, and we need to keep in mind that we have to think of how others will use this in their apps, which may have a different setup than ours.

Let's use this thread to discuss and plan out a format & structure for the "Getting Started" guide.

No file, test, or entry point is named. Review the repository's existing setup and redux-capacitor usage against an existing REST API, then define a guide structure that covers setup, common variations, and edge cases; done means a complete start-to-finish Markdown guide suitable for different app setups.

Written by the indexing model from the issue text.