added search keywords metadata to image preprocessing block (#1931)

* added search keywords metadata to image preprocessing block

Author: rafel-roboflow

inference/core/workflows/core_steps/classical_cv/image_preprocessing/v1.py

@@ -92,6 +92,14 @@ class ImagePreprocessingManifest(WorkflowBlockManifest):
             "long_description": LONG_DESCRIPTION,
             "license": "Apache-2.0",
             "block_type": "classical_computer_vision",
+            "search_keywords": [
+                "resize",
+                "rotate",
+                "flip",
+                "scale",
+                "transform",
+                "mirror",
+            ],
             "ui_manifest": {
                 "section": "classical_cv",
                 "icon": "far fa-image",