docs(react-native): Document screenshot masking options (#17362)

## DESCRIBE YOUR PR

Documents the new `screenshot` options for error screenshot masking on
Android and iOS in the React Native SDK.

**New options documented:**
- `screenshot.maskAllText` / `screenshot.maskAllImages` — toggle
automatic masking of text and images
- `screenshot.maskedViewClasses` / `screenshot.unmaskedViewClasses` —
mask or unmask specific native view classes

**Changes:**
- Updated the screenshots platform include (`react-native.mdx`) with a
"Screenshot Masking" section showing configuration examples
- Added the `screenshot` option to the React Native configuration
options reference page

Companion SDK PR:
getsentry/sentry-react-native#6007
Resolves: getsentry/sentry-react-native#5763

## IS YOUR CHANGE URGENT?

- [ ] Urgent deadline (GA date, etc.)
- [ ] Other deadline
- [x] None: Not urgent, can wait up to 1 week+

## PRE-MERGE CHECKLIST

- [ ] Checked Vercel preview for correctness, including links
- [ ] PR was reviewed and approved by any necessary SMEs (subject matter
experts)
- [ ] PR was reviewed and approved by a member of the [Sentry docs
team](https://github.com/orgs/getsentry/teams/docs)

---------

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: antonis

docs/platforms/react-native/configuration/options.mdx

@@ -153,6 +153,23 @@ _(New in version 4.11.0)_
 
 </SdkOption>
 
+<SdkOption name="screenshot" type="object">
+
+Configures masking for error screenshots. When `attachScreenshot` is enabled, these options control what gets masked in the captured screenshot. Both `maskAllText` and `maskAllImages` default to `true`. You can also specify native view classes to mask or unmask using `maskedViewClasses` and `unmaskedViewClasses`.
+
+```javascript
+screenshot: {
+  maskAllText: true,
+  maskAllImages: true,
+  maskedViewClasses: ["MKMapView"],
+  unmaskedViewClasses: ["MyCustomSafeView"],
+}
+```
+
+Learn more in our <PlatformLink to="/enriching-events/screenshots/">Screenshots documentation</PlatformLink>.
+
+</SdkOption>
+
 <SdkOption name="attachViewHierarchy" type="boolean" defaultValue="false">
 
 Renders a JSON representation of the entire view hierarchy of the application when an error happens and includes it as an attachment.

platform-includes/enriching-events/attach-screenshots/react-native.mdx

@@ -6,3 +6,31 @@ Sentry.init({
   attachScreenshot: true,
 });
 ```
+
+### Screenshot Masking
+
+You can configure masking to automatically redact sensitive content like text and images from error screenshots. Masking is enabled by default.
+
+```javascript
+Sentry.init({
+  dsn: "___PUBLIC_DSN___",
+  attachScreenshot: true,
+  screenshot: {
+    maskAllText: true, // default: true
+    maskAllImages: true, // default: true
+  },
+});
+```
+
+You can also mask or unmask specific native view classes. This is useful for views from third-party native libraries (for example, map views or payment forms):
+
+```javascript
+Sentry.init({
+  dsn: "___PUBLIC_DSN___",
+  attachScreenshot: true,
+  screenshot: {
+    maskedViewClasses: ["MKMapView"], // iOS class name
+    unmaskedViewClasses: ["MyCustomSafeView"],
+  },
+});
+```