Deprecate cocoapods (#882)

Probably it makes sense for native, not sure about flutter and rn.

https://blog.cocoapods.org/CocoaPods-Specs-Repo/

Author: pblazej

.github/workflows/cocoapods-push.yaml

@@ -1,5 +1,9 @@
 # CocoaPods Installation
 
+> [!IMPORTANT]
+>
+> **CocoaPods support is deprecated**. The main [CocoaPods trunk](https://blog.cocoapods.org/CocoaPods-Specs-Repo/) repo as well as LiveKit [podspecs](https://github.com/livekit/podspecs) repo will become read-only and stop receiving updates starting in **2027**. It is strongly recommended to migrate to Swift Package Manager to ensure access to the latest features and security updates.
+
 To install LiveKit using CocoaPods, add the LiveKit podspec source to your
 Podfile in addition to adding the pod:
 

Docs/cocoapods.md

@@ -60,6 +60,10 @@ Add a new package and enter: `https://github.com/livekit/client-sdk-swift`
 
 ### CocoaPods
 
+> [!IMPORTANT]
+>
+> **CocoaPods support is deprecated**. The main [CocoaPods trunk](https://blog.cocoapods.org/CocoaPods-Specs-Repo/) repo as well as LiveKit [podspecs](https://github.com/livekit/podspecs) repo will become read-only and stop receiving updates starting in **2027**. It is strongly recommended to migrate to Swift Package Manager to ensure access to the latest features and security updates.
+
 For installation using CocoaPods, please refer to this [guide](./Docs/cocoapods.md).
 
 ## iOS Usage