FCE-2745: Archive old mobile-client-sdk repo (#529)

## Description

- This repository will be archived

Author: MiloszFilimowski

README.md

@@ -2,6 +2,20 @@
 
 # Fishjam Mobile Client
 
+> [!CAUTION]
+> **This repository has been archived.**
+>
+> The mobile client SDK has been moved to the [web-client-sdk](https://github.com/fishjam-cloud/web-client-sdk) monorepo under [`packages/mobile-client`](https://github.com/fishjam-cloud/web-client-sdk/tree/main/packages/mobile-client).
+>
+> **Why?** The primary goal of this move was to keep the mobile React Native API in sync with the web React API. By housing both clients in a single monorepo, we can share code, align interfaces, and ensure a consistent developer experience across platforms.
+>
+> All future development, issues, and releases will happen in the new location. Please migrate to the new package.
+
+---
+
+<details>
+<summary>Original README (for reference)</summary>
+
 Monorepo containing mobile SDKs for [Fishjam](https://github.com/fishjam-dev/fishjam) server.
 
 - [React Native](./packages/react-native-client/#readme)
@@ -43,3 +57,5 @@ Licensed under the [Apache License, Version 2.0](LICENSE)
 Since 2012 [Software Mansion](https://swmansion.com) is a software agency with experience in building web and mobile apps. We are Core React Native Contributors and experts in dealing with all kinds of React Native issues. We can help you build your next dream product – [Hire us](https://swmansion.com/contact/projects?utm_source=fishjam&utm_medium=mobile-readme).
 
 [![Software Mansion](https://logo.swmansion.com/logo?color=white&variant=desktop&width=200&tag=react-client)](https://swmansion.com/contact/projects?utm_source=fishjam&utm_medium=mobile-readme)
+
+</details>