Add Transform visual regression tests (#59347)

Summary:
Pull Request resolved: #59347

Add a Maestro visual suite for `Transform` using existing RNTester examples. Capture stable cropped checkpoints after opening each example and settling animations.

See `packages/rn-tester/visual-tests/suites/transform.md` for the example and checkpoint inventory.

Changelog: [Internal]

Reviewed By: Abbondanzo

Differential Revision: D126723203

Author: cortinico

packages/rn-tester/visual-tests/flows/transform.yml

@@ -0,0 +1,58 @@
+appId: ${APP_ID}
+---
+- runFlow:
+    file: ../helpers/open-example.yml
+    env:
+      EXAMPLE_URL: rntester://example/TransformExample/rotate
+- extendedWaitUntil:
+    visible:
+      id: 'transform-rotate'
+    timeout: 15000
+- waitForAnimationToEnd:
+    timeout: 5000
+- takeScreenshot:
+    path: ${VISUAL_OUTPUT_DIR}/transform/rotate/default
+    cropOn:
+      id: 'transform-rotate'
+- runFlow:
+    file: ../helpers/open-example.yml
+    env:
+      EXAMPLE_URL: rntester://example/TransformExample/rotate-scale
+- extendedWaitUntil:
+    visible:
+      id: 'transform-rotate-scale'
+    timeout: 15000
+- waitForAnimationToEnd:
+    timeout: 5000
+- takeScreenshot:
+    path: ${VISUAL_OUTPUT_DIR}/transform/rotate-scale/default
+    cropOn:
+      id: 'transform-rotate-scale'
+- runFlow:
+    file: ../helpers/open-example.yml
+    env:
+      EXAMPLE_URL: rntester://example/TransformExample/translate-percentage
+- extendedWaitUntil:
+    visible:
+      id: 'transform-translate-percentage'
+    timeout: 15000
+- waitForAnimationToEnd:
+    timeout: 5000
+- takeScreenshot:
+    path: ${VISUAL_OUTPUT_DIR}/transform/translate-percentage/default
+    cropOn:
+      id: 'transform-translate-percentage'
+- runFlow:
+    file: ../helpers/open-example.yml
+    env:
+      EXAMPLE_URL: rntester://example/TransformExample/string-transform
+- extendedWaitUntil:
+    visible:
+      id: 'transform-string'
+    timeout: 15000
+- waitForAnimationToEnd:
+    timeout: 5000
+- takeScreenshot:
+    path: ${VISUAL_OUTPUT_DIR}/transform/string/default
+    cropOn:
+      id: 'transform-string'

packages/rn-tester/visual-tests/suites/transform.md

@@ -0,0 +1,10 @@
+# Transform visual tests
+
+| Example | Checkpoints |
+| --- | --- |
+| `rotate` | Initial rendering |
+| `rotate-scale` | Initial rendering |
+| `translate-percentage` | Initial rendering |
+| `string-transform` | Initial rendering |
+
+Screenshots use the existing RNTester example crops. Each example starts from a fresh app launch; captures wait for the target and for animations to settle.