Update Examples for variable file

vertexai-google/config/variables.yaml

@@ -6,12 +6,26 @@
 # '<project>/Config/_<environment>/variables.yaml
 #
 
+# Example Variables:
+#  gemini:
+#    apiKey: 'AIzaSyDax'
+#  vertexai-gemini:
+#    projectId: 'generate-text-from-image'
+#    location: 'us-east1'
+#    modelName: 'gemini-1.5-pro-preview-0409'
+#    keyFilePath: 'D:/Credentials/generate-images-for-process-27dba695f5f5.json' (absolute url) 
+#    or keyFilePath: 'configuration/data/generate-images-for-process-27dba695f5f5.json' (relative url)
+
 Variables:
   gemini:
+    # The Api gemini key that get from https://aistudio.google.com/app/apikey.
     apiKey: ''
   vertexai-gemini:
+    # The project id from project that is created in google cloud.
     projectId: ''
+    # The region zone of the project https://cloud.google.com/compute/docs/regions-zones.
     location: ''
+    # The resourceId of gemini model that we want to use (https://console.cloud.google.com/vertex-ai/publishers/google/model-garden/gemini-1.5-pro-001)
     modelName: ''
+    # The full url of the credential json file.
     keyFilePath: ''
-