feat(unity): Added automation snippet to troubleshooting (#5039)

Co-authored-by: Isabel <76437239+imatwawana@users.noreply.github.com>
Co-authored-by: Bruno Garcia <bruno@brunogarcia.com>

Author: 3 people

src/platforms/unity/troubleshooting.mdx

@@ -37,6 +37,33 @@ The `Sentry.Unity.Editor.iOS.dll` is responsible for adding native support to yo
 
 ## Build Issues
 
+### Disabling the Sentry SDK for selected platforms
+
+By adding the snippet below to an `Editor` directory inside your Unity project, you can set up the ability to automatically disable the Sentry SDK for any targeted platform.
+
+```csharp
+using Sentry.Unity;
+using UnityEditor;
+using UnityEditor.Build;
+using UnityEditor.Build.Reporting;
+
+public class PreBuildProcessor : IPreprocessBuildWithReport
+{
+    public int callbackOrder => 0;
+
+    public void OnPreprocessBuild(BuildReport report)
+    {
+        if (report.summary.platform is BuildTarget.Android)
+        {
+            var sentryOptions =
+                AssetDatabase.LoadAssetAtPath<ScriptableSentryUnityOptions>("Assets/Resources/Sentry/SentryOptions.asset");
+            sentryOptions.Enabled = false;
+            EditorUtility.SetDirty(sentryOptions);
+        }
+    }
+}
+```
+
 ### Build input file cannot be found: '**/Libraries/io.sentry.unity/Plugins/iOS/SentryNativeBridge.m'
 
 You can resolve this issue by creating a clean build or chosing "Replace" when prompted. Alternatively, you can remove the unused `SentryNativeBridge.m`from the **UnityFramework Target > Compile Sources** in the project settings. Instead of relying on Unity to copy the `SentryNativeBridge.m` over to the generated Xcode project, starting with 0.12.0, the SDK copies it manually to `**/Libraries/io.sentry.unity/SentryNativeBridge.m`.