docs: improve brownfield docs (#318)

* typo

* docs: clarify brownfield steps

* Update ios.md

---------

Co-authored-by: Michał Pierzchała <[email protected]>

Author: mdjastrzebski

website/docs/docs/brownfield/ios.md

@@ -12,15 +12,15 @@ To add React Native to your iOS app, we'll package your React Native code into a
    ![Framework Target](/brownfield_framework_target.png)
 1. Give your framework a unique name. You'll use this name when adding it to your main app
 1. Right-click the framework folder and select `Convert to Group`. CocoaPods doesn't work properly with references.
-   ![The menu that appears when user right clicks on the generated framework folder](/brownfield_convert_to_group.png)
+   ![The menu that appears when user right clicks on the generated framework folder](/brownfield_convert_to_group.png). Perform this step for both `<FrameworkName>` and `<FrameworkName>Tests` folders.
 1. Set these build settings for your framework:
 
-   | Build Setting                   | Value | What it does                                                                                      |
-   | ------------------------------- | ----- | ------------------------------------------------------------------------------------------------- |
-   | Build Libraries for Distibution | YES   | Creates a module interface for Swift. Also checks if the framework works with your Xcode version. |
-   | User Script Sandboxing          | NO    | Lets scripts modify files, which we need to create the JavaScript bundle.                         |
-   | Skip Install                    | NO    | Makes sure Xcode creates the framework files we need.                                             |
-   | Enable Module Verifier          | NO    | Skips testing the framework during build, which makes builds faster.                              |
+   | Build Setting                    | Value | What it does                                                                                      |
+   | -------------------------------- | ----- | ------------------------------------------------------------------------------------------------- |
+   | Build Libraries for Distribution | YES   | Creates a module interface for Swift. Also checks if the framework works with your Xcode version. |
+   | User Script Sandboxing           | NO    | Lets scripts modify files, which we need to create the JavaScript bundle.                         |
+   | Skip Install                     | NO    | Makes sure Xcode creates the framework files we need.                                             |
+   | Enable Module Verifier           | NO    | Skips testing the framework during build, which makes builds faster.                              |
 
 ## 2. Set Up CocoaPods:
 
@@ -59,6 +59,9 @@ To add React Native to your iOS app, we'll package your React Native code into a
 ## 5. Create the XCFramework:
 
 1. Add `@rnef/plugin-brownfield-ios` to your project
+   ```
+   npm install -D @rnef/plugin-brownfield-ios
+   ```
 1. Add this to your `rnef.config.mjs`:
 
    ```js title="rnef.config.mjs"