chore: Use npm for demos

docs/docs/guides/FRAME_PROCESSORS.mdx

@@ -57,7 +57,7 @@ Because they are written in JS, Frame Processors are simple, powerful, extensibl
 Frame Processors require [react-native-worklets-core](https://github.com/margelo/react-native-worklets-core) 0.2.0 or higher. Install it:
 
 ```sh
-yarn add react-native-worklets-core
+npm i react-native-worklets-core
 ```
 
 And add the plugin to your `babel.config.js`:
@@ -217,7 +217,7 @@ See: ["Creating Frame Processor Plugins"](/docs/guides/frame-processors-plugins-
 Community Frame Processor Plugins are distributed through npm. To install the [vision-camera-resize-plugin](https://github.com/mrousavy/vision-camera-resize-plugin) plugin, run:
 
 ```bash
-yarn add vision-camera-resize-plugin
+npm i vision-camera-resize-plugin
 cd ios && pod install
 ```
 

docs/docs/guides/FRAME_PROCESSOR_PLUGINS.mdx

@@ -15,7 +15,7 @@ Similar to react-native libraries, Frame Processor Plugins are distributed throu
 1. Install using npm:
 
 ```
-yarn add vision-camera-xxxxx
+npm i vision-camera-xxxxx
 cd ios && pod install
 ```
 

docs/docs/guides/SETUP.mdx

@@ -28,7 +28,7 @@ Install [react-native-vision-camera](https://www.npmjs.com/package/react-native-
 
 ```bash
 npm i react-native-vision-camera
-npx pod-install
+cd ios && pod install
 ```
 
 </TabItem>