This PR updates the dev docs and example app docs. It should also update the main repo's README.md file too

Context

We are rebuilding our React Native (RN) SDK to support Customer.io's Data Pipelines.

Public Changes

SDK Changes
- Modernized our RN package to use the latest configurations and dependencies available in RN version 0.74.2.
- Simplified our configuration to provide the minimum number of settings that make sense for our customers.
- Added support to view native debug logs directly in the console alongside other console.* logs.
Example Apps
- Created customer-oriented example apps where you can build, run, debug, and see the SDK usage in the App.tsx file.

SDK Dev Environment Setup
- Removed the pre-push hook that runs lint, as it can be challenging when lint fails before a push in a PR stack setup. Linting has been moved to the pre-commit hook.
- Implemented yarn workspace for easier management of example apps.
- Configured example apps to point to local paths for all native CIO pods, facilitating easier debugging and validation of native changes.
- Made the native iOS repo a git submodule of this repo, simplifying the process of starting and validating relevant native changes within the RN repo.
- Unified the example app codebase for both APN and FCM configurations, making it easier to maintain.
- Included yarn release to ensure a consistent development experience.
- Added yarn.lock to .gitignore.

Dev endpoints for QA can still be set in the example apps with a long-press on the settings button. This allows us to perform QA configurations without affecting customer-oriented examples.