Documentation added for how to deal with Firebase with static frameworks (#8171)

Co-authored-by: Georgy Steshin <gosha212@gmail.com>

Author: markdevocht

website/docs/docs/docs-Installing.mdx

@@ -212,6 +212,52 @@ In Xcode, you will need to edit this file: `AppDelegate.h`. Its content should l
 +  [super application:application didFinishLaunchingWithOptions:launchOptions];
 ```
 
+### Firebase integration on React-Native 0.79:
+
+For Firebase integration with static frameworks the following change needs to be added to your `podfile`:
+
+`podfile`
+```diff
+linkage = ENV['USE_FRAMEWORKS']
+if linkage != nil
+  Pod::UI.puts "Configuring Pod with #{linkage}ally linked Frameworks".green
+  use_frameworks! :linkage => linkage.to_sym
+end
+
++ static_frameworks = [
++  'FirebaseCore',
++  'FirebaseCoreExtension',
++  'GoogleUtilities',
++  'FirebaseCoreInternal',
++  'FirebaseInstallations',
++  'GoogleDataTransport',
++  'FirebaseFirestoreInternal',
++  'FirebaseMessagingInternal',
++  'FirebaseAuth',
++ ]
+
++ pre_install do |installer|
++  installer.pod_targets.each do |pod|
++    if static_frameworks.include?(pod.name)
++      puts "Configuring #{pod.name} as static framework"
++      def pod.build_type
++        Pod::BuildType.new(:linkage => :static, :packaging => :framework)
++      end
++    end
++  end
++ end
+
+target <ProjectName> do
+  config = use_native_modules!
+
++ $RNFirebaseAsStaticFramework = true
+
++  pod 'FirebaseAuthInterop', :modular_headers => true
++  pod 'FirebaseAppCheckInterop', :modular_headers => true
++  pod 'RecaptchaInterop', :modular_headers => true
+...
+```
+
 ### Android
 
 > Make sure your Android Studio installation is up to date. We recommend editing `gradle` and `kotlin` files in Android Studio as the IDE will suggest fixes and point out errors, this way you avoid most common pitfalls.