docs: update readme and changelog

CHANGELOG.md

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+# Changelog
+
+## 1.0.0-BETA.1
+
+* Initial Beta release

README.md

@@ -1,9 +1,49 @@
-# PowerSync Swift
+<p align="center">
+  <a href="https://www.powersync.com" target="_blank"><img src="https://github.com/powersync-ja/.github/assets/7372448/d2538c43-c1a0-4c47-9a76-41462dba484f"/></a>
+</p>
+
+*[PowerSync](https://www.powersync.com) is a sync engine for building local-first apps with instantly-responsive UI/UX and simplified state transfer. Syncs between SQLite on the client-side and Postgres, MongoDB or MySQL on the server-side.*
 
-The PowerSync Swift SDK is an extension of the [PowerSync Kotlin Multiplatform SDK](https://github.com/powersync-ja/powersync-kotlin), and uses the API tool [SKIE](https://skie.touchlab.co/) and KMMBridge to generate and publish a native Swift SDK. More details about this configuration can be found in our blog [here](https://www.powersync.com/blog/using-kotlin-multiplatform-with-kmmbridge-and-skie-to-publish-a-native-swift-sdk).
+# PowerSync Swift
 
 The SDK reference for the PowerSync Swift SDK is available [here](https://docs.powersync.com/client-sdk-references/swift).
 
-## Alpha Release
+## Beta Release
+
+This SDK is currently in a beta release it is suitable for production use, given you have tested your use case(s) extensively. If you find a bug or issue, please open a [GitHub issue](https://github.com/powersync-ja/powersync-swift/issues). Questions or feedback can be posted on our [community Discord](https://discord.gg/powersync) - we'd love to hear from you.
+
+## Structure: Packages
+
+- [Sources](./Sources/)
+
+    - This is the Swift SDK implementation.
+
+## Demo Apps / Example Projects
+
+The easiest way to test the PowerSync Swift SDK is to run our demo application.
+
+- [Demo/PowerSyncExample](./Demo/PowerSyncExample/README.md): A simple to-do list application demonstrating the use of the PowerSync Swift SDK using a Supabase connector.
+
+## Installation
+
+Add
+
+```swift
+.package(url: "https://github.com/powersync-ja/powersync-swift", exact: "<version>")
+```
+
+
+to your `Package.swift` file and pin the dependency to a specific version. This is required because the package is in beta.
+
+## Underlying Kotlin Dependency
+
+The PowerSync Swift SDK currently makes use of the [PowerSync Kotlin Multiplatform SDK](https://github.com/powersync-ja/powersync-kotlin) with the API tool [SKIE](https://skie.touchlab.co/) and KMMBridge under the hood to help generate and publish the native Swift SDK. We will move to an entirely Swift native API in v1 and do not expect there to be any breaking changes.
+
+
+## Migration from Alpha to Beta
 
-This SDK is currently in an alpha release and not suitable for production use, unless you have tested your use case(s) extensively. Breaking changes are still likely to occur.
+* The `PowerSyncDatabase` no longer needs a driver argument and it must be removed.
+* The interface for `PowerSyncDatabase` now uses `PowerSyncDatabaseProtocol` which may require some changes to databases uses.
+* If you were using `__uploadData` and `__fetchCredentials` in your `PowerSyncBackendConnector` you must remove the `__` and update the methods to `uploadData` and `fetchCredentials`.
+* `@MainThread` usage is no longer required and should be removed.
+* Implementing `SuspendTaskWrapper` for database transactions is no longer required and should be removed.