[feat] google CSE engine: add support for images (#6369)

Add support for Google CSE images, the normal google images engine doesn't work
anymore, so this is a good workaround for now.

searx/settings.yml

@@ -1201,13 +1201,10 @@ engines:
     shortcut: go
     inactive: true
 
-  - name: google cse
-    engine: google_cse
-    shortcut: goc
-
   - name: google images
     engine: google_images
     shortcut: goi
+    inactive: true
 
   - name: google news
     engine: google_news
@@ -1218,6 +1215,16 @@ engines:
     shortcut: gov
     inactive: true
 
+  - name: google cse
+    engine: google_cse
+    shortcut: goc
+
+  - name: google cse images
+    engine: google_cse
+    categories: [images, web]
+    google_categ: image
+    shortcut: goci
+
   - name: google scholar
     engine: google_scholar
     shortcut: gos